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201. MEASUREMENT OF INCLUSIVE PRODUCTION OF LIGHT MESON RESONANCES IN HADRONIC DECAYS OF THE Z0

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSEEV, GD and ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G and BARDIN, DY BARKER, G BARONCELLI, A BARRING, O BARRIO, JA and BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y and BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M and BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J and BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P and BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S and BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV and BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA and BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA and CACCIA, M CALVI, M ROZAS, AJC CAMPION, R CAMPORESI, T and CANALE, V CAO, F CARENA, F CARROLL, L CASO, C and GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V and CHAN, A CHAPKIN, M CHARPENTIER, P CHAUSSARD, L and CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L and CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM CLARA, MP and COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G and COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G and CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUM, A and DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J DASILVA, W and DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P and DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DECLERCQ, C and LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B and DEMIN, A DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DUPONT, F EEK, LO EEROLA, PAM EHRET, R and EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N and FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A and FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R and FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J and GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U and GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A and GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F and GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P and GROSSETETE, B GUY, J HAEDINGER, U HAHN, F HAHN, M and HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K and DEMONCHENAULT, GH HAO, W HARRIS, FJ HENKES, T and HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIETANEN, I and HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF and HOOPER, JE HOULDEN, M HRUBEC, J HUET, K HULTH, PO and HULTQVIST, K IOANNOU, P ISENHOWER, D IVERSEN, PS and JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B and JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L and JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M and KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R and KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ and KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORCYL, K and KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U KUCEWICZ, W KULKA, K KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R and LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T and LEVY, JM LIEB, E LIKO, D LINDGREN, J LINDNER, R and LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG and LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D and LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J and MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC and MARKOU, A MARON, T MARTI, S MATHIS, L MATORRAS, F and MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT and MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA and MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ and MYATT, G NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B and NIKOLAENKO, V NILSEN, PES NISS, P OBRAZTSOV, V and OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD and PAPE, L PASSERI, A PEGORARO, M PENNANEN, J and PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PETRIDOU, C and PETROLINI, A PETTERSEN, TE PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S POL, ME POLOK, G POROPAT, P and PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D and RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M and RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, S and ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W and RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHULZE, B SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F and SISAKIAN, AN SKJEVLING, G SMADJA, G SMIRNOV, N SMITH, GR and SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R and SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T and TCHIKILEV, O THEODOSIOU, GE TILQUIN, A TIMMERMANS, J and TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O and TOMARADZE, A TORASSA, E TORTORA, L TREILLE, D and TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A and TSYGANOV, EN TURLUER, ML TUUVA, T TYAPKIN, IA and TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O and UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M and VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W and VERBEURE, F VERTOGRADOV, LS VILANOVA, D VINCENT, P and VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEHR, A WEIERSTALL, M WEILHAMMER, P and WERNER, J WETHERELL, AM WICKENS, JH WILKINSON, GR and WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K and YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Abstract: A study of inclusive production of the meson resonances rho0, K*0 (892), f0(975) and f2(1270) in hadronic decays of the Z0 is presented. The measured mean meson multiplicity per hadronic event is 0.83 +/- 0.14 for the rho0, 0.64 +/- 0.24 for the K*0(892). 0.10 +/- 0.04 for the f0(975) in the momentum range p > 0.05p(beam) (x(p) > 0.05) and 0.11 +/- 0.05 for the f2 (1270) for x(p) > 0. 1. These values and the corresponding differential cross sections (1/sigma(hadr)) dsigma/dx(p) for the vector mesons are in good agreement with the predictions of the JETSET 7.3 PS and HFRWIG 5.4 models. The f2 (1270) production is overestimated by HERWIG but its x(p)-shape is correctly reproduced. The measured ratios of the production cross sections sigma (f2(1270))/sigma(rho0) = 0.22 +/- 0.08 and sigma(f2(1270))/sigma(f0(975)) = 3(-1)+7 for x(p) > 0.1 are consistent with the results obtained in hadronic reactions.
Published: 1993

202. MEASUREMENT OF LAMBDA-B PRODUCTION AND LIFETIME IN Z0 HADRONIC DECAYS

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S and ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P and APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D and BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F and BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M and BONIVENTO, W BOOTH, PSL BORISOV, G BORNER, H BOSIO, C and BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B and BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S and BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C and BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T and BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F and CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A and CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHAPKIN, M and CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CHRIN, JTM COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D and CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DAUBIE, E DAUM, A and DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N DEANGELIS, A and DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N and DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H and DICIACCIO, L DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DUPONT, F EDSALL, D and EEK, LO EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G and PEISERT, AE ENGEL, JP ERSHAIDAT, N FASSOULIOTIS, D and FEINDT, M FENYUK, A ALONSO, MF FERRER, A FILIPPAS, TA and FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F and FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P and FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F and FURNIVAL, K FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C and GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B and GOLOVATYUK, VM GOMEZ, JJ CADENAS, Y GOPAL, G GORN, L and GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E and GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B and GUY, J HAEDINGER, U HAHN, F HAHN, M HAIDER, S and HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K and DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENKES, T and HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL and HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD and HOFMOKL, T HOLMGREN, SO HOLTHUIZEN, D HONORE, PF and HOOPER, JE HOULDEN, M HRUBEC, J HUET, K HULTH, PO and HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK and JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G and KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E and KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J and KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H and KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORCYL, K KORYTOV, AV and KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH and KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U and KUCEWICZ, W KULKA, K KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R and LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T and LEVY, JM LIEB, E LIKO, D LINDGREN, J LINDNER, R and LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG and LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D and LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J and MAIO, A MALTEZOS, A MANDL, F MARCO, J MARGONI, M and MARIN, JC MARKOU, A MARON, T MARTI, S MATORRAS, F and MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT and MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA and MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ and MYATT, G NAVARRIA, FL NEGRI, P NICOLAIDOU, R NIELSEN, BS and NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P and NOMEROTSKI, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R and OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R and PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H and PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S PODOBRIN, O and POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PRIVITERA, P and PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M and RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, S and ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W and RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A and SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC and SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F and SISAKIAN, AN SKJEVLING, G SMADJA, G SMIRNOVA, O SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOFF, TS SPIRITI, E and SQUARCIA, S STAECK, H STANESCU, C STAPNES, S and STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J and STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M and SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE and TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG and TODOROV, T TOET, DZ TOKER, O TOME, B TORASSA, E and TORTORA, L TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURLUER, ML and TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E and FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P and VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS and VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H and WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P and WERNER, J WETHERELL, AM WICKENS, JH WILKINSON, GR and WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K and YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Earth and Planetary Astrophysics
Abstract: Evidence for the production of b-flavoured baryons in Z0 decays is reported from the analysis of 365 000 hadronic events collected by the DELPHI detector. Assuming that most of the weakly decaying b flavoured baryons produced by the Z0 are LAMBDA(b), the observed signal of (LAMBDAl- + LAMBDAl+BAR) pairs, where l is a high transverse momentum lepton in the same jet as the LAMBDA, leads to a production rate: f (b –> LAMBDA(b)) x Br(LAMBDA(b) –> LAMBDAlnuX) = (0.41 +/- 0.13 +/- 0.09)%. Using a sample of 18 reconstructed LAMBDA(b) decay vertices, the lifetime is determined to be tau(LAMBDA(b)) = ( 1.04(-0.38)+0.48 +/- 0.10) ps.
Published: 1993

203. A MEASUREMENT OF THE TAU LIFETIME

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSAN, R and ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ and AMALDI, U ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P and APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D and BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F and BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M and BONIVENTO, W BOOTH, PSL BORISOV, G BORNER, H BOSIO, C and BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B and BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S and BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C and BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T and BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F and CARENA, F CARROLL, L GIMENEZ, MVC CATTAI, A CAVALLO, FR and CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P and CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA and CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM and CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D and CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E and DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J and DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N and DEANGELIS, A DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD and DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A and DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DUPONT, F EEK, LO EEROLA, PAM EHRET, R and EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N and FASSOULIOTIS, D FEINDT, M FENYUK, A ALONSO, MF and FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S and FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J and GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U and GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A and GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F and GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P and GROSSETETE, B GUMENYUK, S GUY, J HAEDINGER, U HAHN, F and HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A and HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ and HEDBERG, V HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H and HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO and HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J and HUET, K HULTH, PO HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P and JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F and KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P and KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P and KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIOUKHINE, V and KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J and KRONKVIST, I KRUENERMARQUIS, U KUCEWICZ, W KULKA, K and KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW and LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G and LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LEVY, JM LIEB, E LIKO, D and LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I and LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A and AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P and LYONS, L MAEHLUM, G MAILLARD, J MAIO, A MALTEZOS, A and MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A and MARON, T MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C and MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R and MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MURRAY, WJ MYATT, G NAVARRIA, FL NEGRI, P and NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES and NISS, P OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A and OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R and PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PETTERSEN, TE and PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P PRIVITERA, P PULLIA, A and RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB and RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P and RONNQVIST, C ROSENBERG, EI ROSSI, S ROSSI, U ROSSO, E and ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V and RUIZ, A RYBIN, A SAARIKKO, H SACQUIN, Y SAJOT, G and SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H and SCHULZE, B SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM and SEITZ, A SEKULIN, R SESSA, M SETTE, G SEUFERT, R and SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S and SIMONETTO, F SISAKIAN, AN SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOFF, TS SPIRITI, E and SQUARCIA, S STAECK, H STANESCU, C STAPNES, S and STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J and STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M and SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE and TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG and TODOROV, T TOET, DZ TOKER, O TOME, B TORASSA, E and TORTORA, L TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURLUER, ML and TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E and FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P and VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS and VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOULGARIS, G VOUTILAINEN, M VRBA, V and WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEHR, A and WEIERSTALL, M WEILHAMMER, P WERNER, J WETHERELL, AM and WICKENS, JH WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P and ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D and ZEYGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R and FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment
Abstract: The tau lepton lifetime is measured using four different methods with the DELPHI detector. Three measurements using one prong decays are combined, accounting for correlations, resulting in tau(tau) = 298 +/- 7 (stat.) +/- 4 (syst.) fs while the decay length distribution of three prong decays gives tau(tau) = 298 +/- 13 (stat.) +/- 5 (syst.) fs. The combined result is tau(tau) = 298 +/- 7 fs. The ratio of the Fermi coupling constant from tau decay relative to that from muon decay is found to be 0.985 +/- 0.013, compatible with lepton universality.
Published: 1993

204. LIMITS ON THE PRODUCTION OF SCALAR LEPTOQUARKS FROM Z(0) DECAYS AT LEP

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSAN, R and ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ and AMALDI, U ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEGALLI, M BEILLIERE, P and BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENVENUTI, AC and BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLOCKI, J BLYTH, S BOCCI, V and BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W and BOOTH, PSL BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B and BOSWORTH, S BOTNER, O BOUQUET, B BOURDARIOS, C and BOWCOCK, TJV BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD and BRENNER, RA BRIAND, H BRICMAN, C BRILLAULT, L BROWN, RCA BRUCKMAN, P BRUNET, JM BUDZIAK, A BUGGE, L and BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F and CARENA, F CARROLL, L GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHAPKIN, M and CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CHRIN, JTM CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R and CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S and DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G and DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVIES, J and DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N and DEANGELIS, A DEBOECK, H DEBOER, W DEBRABANDERE, S and DECLERCQ, C LASO, MDMD DELAVAISSIERE, C DELOTTO, B and DEMIN, A DIJKSTRA, H DICIACCIO, L DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DUPONT, F EDSALL, D EEK, LO EEROLA, PAM and EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ELSING, M and ENGEL, JP ERSHAIDAT, N FASSOULIOTIS, D FEINDT, M FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R and FULDAQUENZER, F FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P and GAZIS, EN GERBER, JP GIACOMELLI, P GILLESPIE, D GOKIELI, R GOLOB, B GOLOVATYUK, VM CADENAS, JJGY GOPAL, G and GORN, L GORSKI, M GRACCO, V GRANT, A GRARD, F and GRAZIANI, E GROSDIDIER, G GROSS, E GROSSETETE, B GUY, J and HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAKANSSON, A and HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W and HARRIS, FJ HEDBERG, V HENKES, T HERNANDEZ, JJ HERQUET, P and HERR, H HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E and HILKE, HJ HODGSON, SD HOFMOKL, T HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HONORE, PF HOULDEN, M HRUBEC, J and HUET, K HULTH, PO HULTQVIST, K IOANNOU, P IVERSEN, PS and JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P and JEANMARIE, B JOHANSSON, EK JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M and KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R and KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H and KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORYTOV, AV KOSTIOUKHINE, V and KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KRAMMER, M and KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U and KRUPINSKI, W KULKA, K KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAST, I and LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F and LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LESIAK, T LEVY, JM LIEB, E LIKO, D LINDGREN, J and LINDNER, R LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG and LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D and LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J and MAIO, A MALTEZOS, A MANDL, F MARCO, J MARGONI, M and MARIN, JC MARKOU, A MARON, T MARTI, S MARTINEZRIVERO, C and MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M and MCCUBBIN, M MCKAY, R MCNULTY, R MEDBO, J MEOLA, G and MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I MIRABITO, L and MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T and MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H and MURRAY, WJ MURYN, B MYATT, G NAVARRIA, FL NEGRI, P and NEMECEK, S NICOLAIDOU, R NIELSEN, BS NIJJHAR, B and NIKOLAENKO, V NILSEN, PES NISS, P NOMEROTSKI, A and OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A and OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H and PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PETROVYKH, L PIANA, G PIERRE, F PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O and POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PRIVITERA, P and PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL REBECCHI, P REDAELLI, NG and REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F and RICHARDSON, J RIDKY, J RINAUDO, G RODITI, I ROMERO, A and RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI and ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W and RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K SAARIKKO, H and SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M and SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F and SEGAR, AM SEITZ, A SEKULIN, R SESSA, M SEUFERT, R and SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S and SIMONETTO, F SISAKIAN, AN SKJEVLING, G SMADJA, G and SMIRNOV, N SMIRNOVA, O SMITH, GR SOSNOWSKI, R and SOUZASANTOS, D SPASSOFF, TS SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R and STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P and TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOMARADZE, A TOME, B TORASSA, E TORTORA, L TREILLE, D TRISCHUK, W TRISTRAM, G TRONCON, C and TSIROU, A TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T and TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VANELDIK, J VAZ, P VEGNI, G and VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E and VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M and WEILHAMMER, P WETHERELL, AM WICKENS, JH WILKINSON, GR and WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K and YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZIMIN, NI ZITO, M ZONTAR, D ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: A search has been made for pairs and for single production of scalar leptoquarks of the first and second generations using a data sample of 392000 Z0 decays from the DELPHI detector at LEP 1. No signal was found and limits on the leptoquark mass, production cross section and branching ratio were set. A mass limit at 95% confidence level of 45.5 GeV/c2 was obtained for leptoquark pair production. The search for the production of a single leptoquark probed the mass region above this limit and its results exclude first and second generation leptoquarks D0 with masses below 65 GeV/c2 and 73 GeV/c2 respectively, at 95% confidence level, assuming that the D0lq Yukawa coupling alpha(lambda) is equal to the electromagnetic one. An upper limit is also given on the coupling alpha(lambda) as a function of the leptoquark mass m(D0).
Published: 1993

205. PRODUCTION OF LAMBDA AND LAMBDA(LAMBDA)OVER-BAR CORRELATIONS IN THE HADRONIC DECAYS OF THE Z(0)

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSAN, R and ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ and AMALDI, U ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEGALLI, M BEILLIERE, P and BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENVENUTI, AC and BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLOCKI, J BLYTH, S BOCCI, V and BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W and BOOTH, PSL BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B and BOSWORTH, S BOTNER, O BOUDINOV, E BOUQUET, B and BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S and BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C and BRILLAULT, L BROWN, RCA BRUCKMAN, P BRUNET, JM and BUDZIAK, A BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, R and CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L and GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V and CHAN, A CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J and CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P and CHOROWICZ, V CHRIN, JTM CINDRO, V COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G MAESTRO, JC CZELLAR, S and DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G and DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVIES, J and DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N and DEANGELIS, A DEBOECK, H DEBOER, W DEBRABANDERE, S and DECLERCQ, C DEFEZLASO, MDM DELAVAISSIERE, C DELOTTO, B and DEMIN, A DIJKSTRA, H DICIACCIO, L DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DUPONT, F EDSALL, D EEK, LO EEROLA, PAM and EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ELSING, M and ENGEL, JP ERSHAIDAT, N SANTO, ME FALALEEV, V and FASSOULIOTIS, D FEINDT, M FERRER, A FILIPPAS, TA and FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P and FRIES, DC FRODESEN, AG FULDAQUENZER, F FURSTENAU, H and FUSTER, J GAMBA, D GARCIA, C GARCIA, J GASPAR, C and GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP and GIACOMELLI, P GILLESPIE, D GOKIELI, R GOLOB, B and GOLOVATYUK, VM CADENAS, JJGY GOPAL, G GORN, L GORSKI, M and GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSETETE, B GUMENYUK, S GUY, J and HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAJDUK, Z and HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH and HAO, W HARRIS, FJ HEDBERG, V HENKES, T HENRIQUES, R and HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIETANEN, I and HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMGREN, SO HOLT, PJ HOLTHUIZEN, D HONORE, PF and HOULDEN, M HRUBEC, J HUET, K HULTH, PO HULTQVIST, K and IOANNOU, P IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JONKER, M and JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F and KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ and KLEIN, H KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORCYL, K and KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O and KRAMER, PH KRAMMER, M KREUTER, C KROLIKOWSKI, J and KRONKVIST, I KRUENERMARQUIS, U KUCEWICZ, W KULKA, K and KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW and LANCERI, L LAPIN, V LAST, I LAUGIER, JP LAUHAKANGAS, R and LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LEVY, JM LIEB, E and LIKO, D LINDGREN, J LINDNER, R LIPPI, I LOERSTAD, B and LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL and LOS, M LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L and MAEHLUM, G MAILLARD, J MAIO, A MALTEZOS, A MANDL, F and MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T and MARTI, S MARTINEZRIVERO, C MATORRAS, F MATTEUZZI, C and MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R and MEDBO, J MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M and MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV and MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR and MORETTINI, P MUELLER, H MURRAY, WJ MYATT, G NAVARRIA, FL and NEGRI, P NEMECEK, S NICOLAIDOU, R NIELSEN, BS and NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P NOMEROTSKI, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A and OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H and PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PIANA, G PIERRE, F and PIMENTA, M PLASZCZYNSKI, S PODOBRIN, O POL, ME and POLOK, G POROPAT, P POZDNIAKOV, V PRIVITERA, P PULLIA, A and RADOJICIC, D RAGAZZI, S RAHMANI, H RAMES, J RATOFF, PN READ, AL REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, J and RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSO, E and ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V and RUIZ, A SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J and SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE and SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A SEKULIN, R and SESSA, M SEUFERT, R SHELLARD, RC SICCAMA, I and SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN and SKJEVLING, G SMADJA, G SMIRNOVA, O SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOV, T SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R and STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P and TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOMARADZE, A TOME, B TORASSA, E TORTORA, L TREILLE, D TRISCHUK, W TRISTRAM, G TRONCON, C and TSIROU, A TSYGANOV, EN TURLUER, ML TUUVA, T TYAPKIN, IA and TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O and UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M and VANDONINCK, WK VANELDIK, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS and VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H and WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P and WETHERELL, AM WICKENS, JH WILKINSON, GR WILLIAMS, WSC and WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZANIN, M ZAVRTANIK, D ZEVGOLATAKOS, E ZIMIN, NI ZITO, M and ZONTAR, D ZUBERI, R ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment
Abstract: An analysis of the production of the LAMBDA baryon in the hadronic decays of the Z0 is presented, based on about 993K multihadronic events collected by the DELPHI detector at LEP during 1991 and 1992. The differential cross section of the LAMBDA and the correlations between LAMBDA and LAMBDABAR produced in the same event are compared to current models, based both on string fragmentation and on cluster decay. The predictions of the string fragmentation model are found to give satisfactory agreements with the data, clearly better than those of the cluster model.
Published: 1993

206. A MEASUREMENT OF THE MEAN LIFETIMES OF CHARGED AND NEUTRAL B-HADRONS

Author: ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I and ALEKSAN, R ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S and ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P and APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE and AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D and BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F and BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M and BONIVENTO, W BOOTH, PSL BORISOV, G BORNER, H BOSIO, C and BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B and BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S and BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C and BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T and BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F and CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A and CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P and CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA and CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM and COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G and COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G and CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DAUBIE, E DAUM, A DAUNCEY, PD and DAVENPORT, M DAVID, P DAVIES, J DASILVA, W DEFOIX, C and DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H and DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N and DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H and DICIACCIO, L DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DUPONT, F EDSALL, D and EEK, LO EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G and PEISERT, AE ENGEL, JP ERSHAIDAT, N FALALEEV, V and FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F and FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P and FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F and FURNIVAL, K FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C and GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B and GOLOVATYUK, VM CADENAS, JJGY GOPAL, G GORN, L GORSKI, M and GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B GUY, J and HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAKANSSON, A and HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENKES, T HERNANDEZ, JJ HERQUET, P and HERR, H HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E and HILKE, HJ HODGSON, SD HOFMOKL, T HOLMGREN, SO and HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J and HUET, K HULTH, PO HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P and JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F and KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P and KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P and KORATZINOS, M KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C and KOUZNETSOV, O KRAMER, PH KREUTER, C KROLIKOWSKI, J and KRONKVIST, I KRUENERMARQUIS, U KRUPINSKI, W KULKA, K and KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW and LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G and LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LEVY, JM LIEB, E LIKO, D and LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I and LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A and AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P and LYONS, L MAEHLUM, G MAILLARD, J MAIO, A MALTEZOS, A and MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A and MARON, T MARTI, S MATORRAS, F MATTEUZZI, C MATTHIAE, G and MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I and MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U and MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MURRAY, WJ MURYN, B MYATT, G NAVARRIA, FL and NEGRI, P NICOLAIDOU, R NIELSEN, BS NIJJHAR, B and NIKOLAENKO, V NILSEN, PES NISS, P NOMEROTSKI, A and OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A and OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H and PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S PODOBRIN, O POL, ME and POLOK, G POROPAT, P POZDNIAKOV, V PRIVITERA, P PULLIA, A and RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REBECCHI, P REDAELLI, NG REGLER, M REID, D and RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, S ROSSO, E and ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V and RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G and SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H and SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A and SEKULIN, R SESSA, M SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN and SKJEVLING, G SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR and SOSNOWSKI, R SOUZASANTOS, D SPASSOFF, TS SPIRITI, E and SQUARCIA, S STAECK, H STANESCU, C STAPNES, S and STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J and STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M and SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE and TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG and TODOROV, T TOET, DZ TOKER, O TOME, B TORASSA, E and TORTORA, L TRIELLE, D TRISCHUK, W TRISTRAM, G TRONCON, C and TSIROU, A TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W and VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D and VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M and VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F and WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J and WETHERELL, AM WICKENS, JH WILKINSON, GR WILLIAMS, WSC and WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N and YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P and ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M and ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Nuclear Experiment, Astrophysics::Galaxy Astrophysics
Abstract: The decays of B-hadrons have been reconstructed using the charged particles recorded in the DELPHI silicon microstrip detector. The sum of the charges of the secondaries determines the charge of the B-hadron parent. Some 232 114 multihadronic Z0 decays recorded during the 1991 run of LEP at centre-of-mass energies between 88.2 GeV and 94.2 GeV yield 253 B-hadron candidates with well-measured charge. From these the mean lifetimes of neutral and charged B-hadrons are found to be 1.44 +/- 0.21(stat.) +/- 0.14(syst.) ps and 1.56 +/- 0.19(stat.) +/- 0.13(syst.) ps respectively. The ratio of their lifetimes is 1.09(-0.23)+0.28 (Stat.) +/- 0.11 (syst.). Under some assumptions on the abundance and lifetime of the LAMBDA(b)0 and B(s)0 states, the B0 and B+ lifetimes are inferred.
Published: 1993

207. Measurement of Lambda-b Production and Lifetime In Z0 Hadronic Decays

Author: Abreu, P., Adam, W., Adye, T., Agasi, E., Azhinenko, I., Aleksan, R., Alekseev, G.D., Algeri, A., Allen, P., Almehed, S., Alvsvaag, S.J., Amaldi, U., Andreazza, A., Antilogus, P., Apel, W.D., Apsimon, R.J., Arnoud, Y., Asman, B., Augustin, J.-E., Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, Guido, Bardin, D.Yu., Barker, G., Baroncelli, A., Barring, O., Barrio, J.A., Bartl, W., Bates, M.J., Battaglia, M., Baubillier, M., Becks, K.H., Beeston, C.J., Begalli, M., Beilliere, P., Belokopytov, Yu., Beltran, P., Benedic, D., Benvenuti, A.C., Berggren, M., Bertrand, D., Bianchi, F., Bilenkii, M.S., Billoir, P., Bjarne, J., Bloch, D., Blyth, S., Bocci, V., Bogolubov, P., Bolognese, T., Bonesini, M., Bonivento, W., Booth, P.S.L., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Bosworth, S., Botner, O., Bouquet, B., Bourdarios, C., Bowcock, T.J.V., Bozzo, M., Braibant, S., Branchini, P., Brand, K.D., Brenner, R.A., Briand, H., Bricman, C., Brown, R.C.A., Brummer, N., Brunet, J.M., Bugge, L., Buran, T., Burmeister, H., Buytaert, J.A.M.A., Caccia, M., Calvi, M., Camacho Rozas, A.J., Campion, R., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., Caso, C., Castillo Gimenez, M.V., Cattai, A., Cavallo, F.R., Cerrito, L., Chabaud, V., Chan, A., Chapkin, M., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, G.A., Chevalier, L., Chliapnikov, P., Chorowicz, V., Chrin, J.T., Clara, M.P., Collins, P., Contreras, J.L., Contri, R., Cortina, E., Cosme, G., Couchot, F., Crawley, H.B., Crennell, D., Crosetti, G., Crozon, M., Cuevas Maestro, J., Czellar, S., Dahl-Jensen, E., D'Almagne, B., Dam, M., Damgaard, G., Daubie, E., Daum, A., Dauncey, P.D., Davenport, M., David, P., Davies, J., Da Silva, W., Defoix, C., Delpierre, P., Demaria, N., De Angelis, A., De Boeck, H., De Boer, W., De Clercq, C., De Fez Laso, M.D.M., De Groot, N., De La Vaissiere, C., De Lotto, B., De Min, A., Dijkstra, H., Di Ciaccio, L., Djama, F., Dolbeau, J., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Dupont, F., Eek, L.O., Eerola, P.A.M., Ehret, R., Ekelof, T., Ekspong, G., Elliot Peisert, A., Engel, J.P., Ershaidat, W., Fassouliotis, D., Feindt, M., Fenyuk, A., Fernandez Alonso, M., Ferrer, A., Filippas, T.A., Firestone, A., Foeth, H., Fokitis, E., Fontanelli, F., Forbes, K.A.J., Fousset, J.L., Francon, S., Franek, B., Frenkiel, P., Fries, D.C., Frodesen, A.G., Fruhwirth, R., Fulda-Quenzer, F., Furnival, K., Furstenau, H., Fuster, J., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, E.N., Gerber, J.P., Giacomelli, P., Gokieli, R., Golob, B., Golovatyuk, V.M., Gomez, Y Cadenas J.J., Goobar, A., Gopal, G., Gorski, M., Gracco, V., Grant, A., Grard, F., Graziani, E., Grosdidier, G., Gross, E., Grosse-Wiesmann, P., Grossetete, B., Guy, J., Haedinger, U., Hahn, F., Hahn, M., Haider, S., Hajduk, Z., Hakansson, A., Hallgren, A., Hamacher, K., Hamel De Monchenault, G., Hao, W., Harris, F.J., Hedberg, V., Henkes, T., Hernandez, J.J., Herquet, P., Herr, H., Hessing, T.L., Hietanen, I., Higgins, C.O., Higon, E., Hilke, H.J., Hodgson, S.D., Hofmokl, T., Holmes, R., Holmgren, S.O., Holthuizen, D., Honore, P.F., Hooper, J.E., Houlden, M., Hrubec, J., Huet, C., Hulth, P.O., Hultqvist, K., Ioannou, P., Iversen, P.S., Jackson, J.N., Jalocha, P., Jarlskog, G., Jarry, P., Jean-Marie, B., Johansson, E.K., Johnson, D., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalmus, G., Kapusta, F., Karlsson, M., Karvelas, E., Katsanevas, S., Katsoufis, E.C., Keranen, R., Kesteman, J., Khomenko, B.A., Khovanski, N.N., King, B., Kjaer, N.J., Klein, H., Klovning, A., Kluit, P., Koch-Mehrin, A., Kohne, J.H., Koene, B., Kokkinias, P., Koratzinos, M., Korcyl, K., Korytov, A.V., Kostukhin, V., Kourkoumelis, C., Kouznetsov, O., Kramer, P.H., Krolikowski, J., Kronkvist, I., Kruner-Marquis, U., Kucewicz, W., Kulka, K., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, J.W., Lanceri, L., Lapin, V., Laugier, J.P., Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Lesiak, T., Levy, J.M., Lieb, E., Liko, D., Lindgren, J., Lindner, R., Lipniacka, A., Lippi, I., Lorstad, B., Lokajicek, M., Loken, J.G., Lopez-Fernandez, A., Lopez Aguera, M.A., Los, M., Loukas, D., Lozano, J.J., Lutz, P., Lyons, L., Maehlum, G., Maillard, J., Maio, A., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, J.C., Markou, A., Maron, T., Marti, S., Mathis, L., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., McCubbin, M., McKay, R., McNulty, R., Meola, G., Meroni, C., Meyer, W.T., Michelotto, M., Mikulec, I., Mirabito, L., Mitaroff, W.A., Mitselmakher, G., Mjornmark, U., Moa, T., Moller, R., Monig, K., Monge, M.R., Morettini, P., Muller, H., Murray, W.J., Myatt, G., Navarria, F.L., Negri, P., Nicolaidou, R., Nielsen, B.S., Nijjhar, B., Nikolaenko, V., Nilsen, P.E.S., Niss, P., Obraztsov, V., Olshevski, A.G., Orava, R., Ostankov, A., Osterberg, K., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T., Pape, L., Parodi, F., Passeri, A., Pegoraro, M., Pennanen, J., Peralta, L., Pernegger, H., Pernicka, M., Perrotta, A., Petridou, C., Petrolini, A., Pettersen, T.E., Pierre, F., Pimenta, M., Pingot, O., Plaszczynski, Stéphane, Podobrin, O., Pol, M.E., Polok, G., Poropat, P., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Rahmani, H., Ratoff, P.N., Read, A.L., Rebecci, P., Redaelli, N.G., Regler, M., Reid, D., Renton, P.B., Resvanis, L.K., Richard, F., Richardson, M., Ridky, J., Rinaudo, G., Roditi, I., Romero, A., Roncagliolo, I., Ronchese, P., Ronnqvist, C., Rosenberg, E.I., Rossi, S., Rossi, U., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmann-Kleider, V., Ruiz, A., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, J., Sannino, M., Schael, S., Schneider, H., Schulze, B., Schyns, M.A.E., Sciolla, G., Scuri, F., Segar, A.M., Seitz, A., Sekulin, R., Sessa, M., Sette, G., Seufert, R., Shellard, R.C., Siccama, I., Siegrist, P., Simonetti, S., Simonetto, F., Sisakian, A.N., Skjevling, G., Smadja, G., Smith, G.R., Sosnowski, R., Souza-Santos, D., Spassov, T.S., Spiriti, E., Squarcia, S., Stack, H., Stanescu, C., Stapnes, S., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Straver, J., Strub, R., Stugu, B., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Chikilev, O., Theodosiou, G., Tilquin, A., Timmermans, J., Timofeev, V.G., Tkatchev, L.G., Todorov, T., Toet, D.Z., Toker, O., Tome, B., Torassa, E., Tortora, L., Treille, D., Trevisan, U., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, E.N., Turluer, M.L., Tuuva, T., Tyapkin, I.A., Tyndel, M., Tzamarias, S., Uberschar, S., Ullaland, O., Uvarov, V.A., Valenti, G., Vallazza, E., Valls Ferrer, J.A., Vander Velde, C., Van Apeldoorn, G.W., Van Dam, P., Van Der Heijden, M., Van Doninck, W.K., Vaz, P., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Verlato, M., Vertogradov, L.S., Vilanova, D., Vincent, P., Vitale, L., Vlasov, E., Vodopyanov, A.S., Vollmer, M., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wayne, M., Wehr, A., Weierstall, M., Weilhammer, P., Werner, J., Wetherell, A.M., Wickens, J.H., Wilkinson, G.R., Williams, W.S.C., Winter, M., Witek, M., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zhang, G., Zimin, N.I., Zito, M., Zuberi, R., Zukanovich Funchal, R., Zumerle, G., Zuniga, J., Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), DELPHI, Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Delphi, Collaboration, Abreu, P., Adam, W., and Canale, Vincenzo
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, High Energy Physics::Phenomenology, Hadron, Elementary particle, Astrophysics::Cosmology and Extragalactic Astrophysics, Jet (particle physics), 01 natural sciences, Nuclear physics, Baryon, 0103 physical sciences, Transverse momentum, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], BARYON PRODUCTION, High Energy Physics::Experiment, Production (computer science), Astrophysics::Earth and Planetary Astrophysics, 010306 general physics, Particle Physics - Experiment, Lepton
Abstract: Evidence for the production of b-flavoured baryons in Z0 decays is reported from the analysis of 365 000 hadronic events collected by the DELPHI detector. Assuming that most of the weakly decaying b flavoured baryons produced by the Z0 are Λb, the observed signal of View the MathML source pairs, where l is a high transverse momentum lepton in the same jet as the Λ, leads to a production rate: f(b→Λb)×Br(Λb→ΛlνX) = (0.41±0.13±0.09)%. Using a sample of 18 reconstructed Λb decay vertices, the lifetime is determined to be τ(Λb) = (1.04+0.48−0.38±0.10) ps.
Published: 1993

208. DETERMINATION OF ALPHA-S FROM THE SCALING VIOLATION IN THE FRAGMENTATION FUNCTIONS IN E+E- ANNIHILATION

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSAN, R and ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ and AMALDI, U ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GI BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D and BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F and BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M and BONIVENTO, W BOOTH, PSL BORISOV, G BORNER, H BOSIO, C and BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B and BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S and BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C and BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T and BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F and CARENA, F CARROLL, L GIMENEZ, MVC CATTAI, A CAVALLO, FR and CERRITO, L CHABAUD, V CHAN, A CHAPKIN, M and CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CHRIN, JTM COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D and CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E and DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J and DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N and DEANGELIS, A DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD and DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A and DIJKSTRA, H DICIACCIO, L DOLBEAU, J DONSZELMANN, M and DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y and DUPONT, F EDSALL, D EEK, LO EEROLA, PAM EHRET, R and EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N and FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A and FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R and FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J and GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U and GAVILLET, P GAZIS, EN GERBER, JP GERDYUKOV, L and GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM and CADENAS, JJGY GOPAL, G GORN, L GORSKI, M GRACCO, V and GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E and GROSSEWIESMANN, P GROSSETETE, B GUY, J HAEDINGER, U and HAHN, F HAHN, M HAIDER, S HAKANSSON, A HALLGREN, A and HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H and HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ and HODGSON, SD HOFMOKL, T HOLMGREN, SO HOLTHUIZEN, D and HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HUET, K and HULTH, PO HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B and JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P and KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M and KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R and KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ and KLEIN, H KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORYTOV, AV and KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH and KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U and KRUPINSKI, W KULKA, K KURVINEN, K KUSSMAUL, T LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V and LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LESIAK, T LEVY, JM LIEB, E LIKO, D LINDGREN, J and LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M and LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G and MAILLARD, J MAIO, A MALTEZOS, A MANDL, F MARCO, J and MARGONI, M MARIN, JC MARKOU, A MARON, T MARTI, S and MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M and MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C and MEYER, WT MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R and MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ and MURYN, B MYATT, G NAVARRIA, FL NEGRI, P NICOLAIDOU, R NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES and NISS, P NOMEROTSKI, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M and PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F and PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A and PETROVYKH, L PIERRE, F PIMENTA, M PINGOT, O and PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P and POZDNIAKOV, V PRIVITERA, P PULLIA, A RADOJICIC, D and RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REBECCHI, P and REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G and RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P and RONNQVIST, C ROSENBERG, EI ROSSI, S ROSSO, E ROUDEAU, P and ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A and RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J and SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE and SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A SEKULIN, R and SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SICCAMA, I and SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN and SKJEVLING, G SMADJA, G SMIRNOVA, O SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOFF, TS SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R and STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P and TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOME, B TORASSA, E TORTORA, L TREILLE, D and TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C and TSIROU, A TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T and TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W and VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D and VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M and VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F and WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J and WETHERELL, AM WICKENS, JH WILKINSON, GR WILLIAMS, WSC and WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N and YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P and ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M and ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: A determination of the hadronic fragmentation functions of the Z0 boson is presented from a study of the inclusive hadron production with the DELPHI detector at LEP. These fragmentation functions were compared with the ones at lower energies, thus covering data in a large kinematic range: 196 less-than-or-equal-to Q2 less-than-or-equal-to 8312 GeV2 and x (= p(h)/E(beam)) > 0.08. A large scaling violation was observed, which was used to extract the strong coupling constant in second order QCD: alpha(s)(M(Z)) = 0.118 +/- 0.005. The corresponding QCD scale for five quark flavours is: LAMBDA(MS)(5)BAR = 230 +/- 60 MeV.
Published: 1993

209. A measurement of D meson production in Z0 hadronic decays

Author: Abreu, P. Adam, W. Adye, T. Agasi, E. Ajinenko, I. Aleksan, R. Alekseev, G.D. Algeri, A. Allen, P. Almehed, A. Alvsvaag, S.J. Amaldi, U. Andreazza, A. Antilogus, P. Apel, W.-D. Apsimon, R.J. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barate, R. Barbiellini, G. Bardin, D.Y. Barker, G.J. Baroncelli, A. Barring, O. Barrio, J.A. Bartl, W. Bates, M.J. Battaglia, M. Baubillier, M. Becks, K.-H. Beeston, C.J. Begalli, M. Beilliere, P. Belokopyptov, Yu. Beltran, P. Benedic, D. Benvenuti, A.C. Berggren, M. Bertrand, D. Bianchi, F. Bilenky, M.S. Billoir, P. Bjarne, J. Bloch, D. Blyth, S. Bocci, V. Bogolubov, P.N. Bolognese, T. Bonesini, M. Bonivento, W. Booth, P.S.L. Borisov, G. Borner, H. Bosio, C. Bostjancic, B. Bosworth, S. Botner, O. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Bozzo, M. Braibant, S. Branchini, P. Brand, K.D. Brenner, R.A. Briand, H. Bricman, C. Brown, R.C.A. Brummer, N. Brunet, J.-M. Bugge, L. Buran, T. Burmeister, H. Buytaert, J.A.M.A. Caccia, M. Calvi, M. Camacho Rozas, A.J. Campion, R. Camporesi, T. Canale, V. Cao, F. Carena, F. Carroll, L. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Cerrito, L. Chabaud, V. Chan, A. Chapkin, M. Charpentier, Ph. Chaussard, L. Chauveau, J. Checchia, P. Chelkov, G.A. Chevalier, L. Chliapnikov, P. Chorowicz, V. Chrin, J.T.M. Collins, P. Contreras, J.L. Contri, R. Cortina, E. Cosme, G. Couchot, F. Crawley, H.B. Crennell, D. Crosetti, G. Crozon, M. Cuevas Maestro, J. Czellar, S. Dahl-Jensen, E. Dalmagne, B. Dam, M. Damgaard, G. Darbo, D. Daubie, E. Daum, A. Dauncey, P.D. Davenport, M. Davies, P. De Silva, W. Defoix, C. Delpierre, P. Demaria, N. De Angelis, A. De Boeck, H. De Boer, W. De Clerq, C. De Fez Laso, M.D.M. De Groot, N. De La Vaissiere, C. De Lotto, B. De Min, A. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Donszelmann, M. Doroba, K. Dracos, M. Drees, J. Dris, M. Dufour, Y. Dupont, F. Edsall, D. Eek, L.-O. Eerola, P.A.-M. Ehret, R. Ekelof, T. Ekspong, G. Elliot Peisert, A. Engel, J.-P. Ershaidat, N. Fassouliotis, D. Feindt, M. Fenyuk, A. Fernandez Alonso, M. Ferrer, A. Filippas, T.A. Firestone, A. Foeth, H. Fokitis, E. Fontanelli, F. Forbes, K.A.J. Fousset, J.-L. Francon, S. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Furnival, K. Furstenau, H. Fuster, J. Gamba, D. Garcia, C. Garcia, J. Gaspar, C. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gerber, J.-P. Giacomelli, P. Gokieli, R. Golob, B. Golovatyuk, V.M. Gomez Y Cadenas, J.J. Gopal, G. Gorski, M. Gracco, V. Grant, A. Grard, F. Graziani, E. Grosdidier, G. Gross, E. Grosse-Wiesmann, P. Grossetete, B. Guy, J. Haedinger, U. Hahn, F. Hahn, M. Haider, S. Hajduk, Z. Hakansson, A. Hallgren, A. Hamacher, K. Hamel De Monchenault, G. Hao, W. Harris, F.J. Hedberg, V. Henkes, T. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Hietanen, I. Higgins, C.O. Higon, E. Hilke, H.J. Hodgson, S.D. Hofmokl, T. Holmes, R. Holmgren, S.-O. Holthuizen, D. Honore, P.F. Hooper, J.E. Houlden, M. Hrubec, J. Huet, K. Hulth, P.O. Hultqvist, K. Ioannou, P. Iversen, P.-S. Jackson, J.N. Jalocha, P. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Johnson, D. Jonker, M. Jonsson, L. Juillot, P. Kalkanis, G. Kalmus, G. Kapusta, F. Karlsson, M. Karvelas, E. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kesteman, J. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, N.J. Klein, H. Klovning, A. Kluit, P. Koch-Mehrin, A. Köhne, J.H. Koene, B. Kokkinias, P. Koratzinos, M. Korcyl, K. Korytov, A.V. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Kramer, P.H. Krolikowski, J. Kronkvist, I. Kruener-Marquis, U. Kucewicz, W. Kulka, K. Kurvinen, K. Lacasta, C. Lambropoulos, C. Lamsa, J.W. Lanceri, L. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Leitner, R. Lemoigne, Y. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Levy, J.M. Lieb, E. Liko, D. Lindgren, J. Lindner, R. Lipniacka, A. Lippi, I. Loerstad, B. Lokajicek, M. Loken, J.G. Lopez-Fernandez, A. Lopez Aguera, M.A. Los, M. Loukas, D. Lozano, J.J. Lutz, P. Lyons, L. Maehlum, G. Maillard, J. Miao, A. Maltezos, A. Mandl, F. Marco, J. Margoni, M. Marin, J.-C. Markou, A. Maron, T. Marti, S. Mathis, L. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Meola, G. Meroni, C. Meyer, W.T. Michelotto, M. Mikulec, I. Mirabito, L. Mitaroff, W.A. Mitselmakher, G.V. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Morettini, P. Mueller, H. Murray, W.J. Myatt, G. Navarria, F.L. Negri, P. Nicolaidou, R. Nielsen, B.S. Nijjhar, B. Nikolaenko, V. Nilsen, P.E.S. Niss, P. Nomerotski, A. Obraztsov, V. Olshevski, A.G. Orava, R. Ostankov, A. Osterberg, K. Ouraou, A. Paganoni, M. Pain, R. Palka, H. Papadopoulou, Th.D. Pape, L. Parodi, F. Passeri, A. Pegoraro, M. Pennanen, J. Peralta, L. Pernegger, H. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Pierre, F. Pimenta, M. Pingot, O. Plaszcznski, S. Podobrin, O. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, M. Ridky, J. Rinaudo, G. Roditi, I. Romero, A. Roncagliolo, I. Ronchese, P. Ronnqvist, C. Rosenberg, E.I. Rossi, S. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sajot, G. Salt, J. Sanchez, J. Sannino, M. Schael, S. Schneider, H. Schyns, M.A.E. Sciolla, G. Scuri, F. Segar, A.M. Seitz, A. Sekulin, R. Sessa, M. Sette, G. Seufert, R. Shellard, R.C. Siccama, I. Siegrist, P. Simonetti, S. Simonetto, F. Sisakian, A.N. Skjevling, G. Smadja, G. Smirnova, O. Smith, G.R. Rosnowski, R. Souza-Santos, D. Spassoff, T.S. Spiriti, E. Squarcia, S. Staeck, H. Stanescu, C. Stapnes, S. Stavropoulos, G. Stichelbaut, F. Stocchi, A. Strauss, J. Straver, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Szymanski, P. Tabarelli, T. Tchikilev, O. Theodosiou, G.E. Tilquin, A. Timmermans, J. Timofeev, V.G. Tkatchev, L.G. Todorov, T. Toet, D.Z. Toker, O. Tome, B. Torassa, E. Tortora, L. Trielle, D. Trevisan, U. Trischuk, W. Tristram, G. Troncon, C. Tsirou, A. Tsyganov, E.N. Turluer, M.-L. Tuuva, T. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Ueberschaer, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Valls Ferrer, J.A. Vander Velde, C. Van Apeldoorn, G.W. Van Dam, P. Van Der Heijden, M. Van Doninck, W.K. Vaz, P. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Vilanova, D. Vincent, P. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vollmer, M. Voutilainen, M. Vrba, V. Wahlen, H. Walck, C. Waldner, F. Wayne, M. Wehr, A. Weierstall, M. Weilhammer, P. Werner, J. Wetherell, A.M. Wickens, J.H. Wilkinson, G.R. Williams, W.S.C. Winter, M. Witek, M. Wormser, G. Woschnagg, K. Yamdagni, N. Yepes, P. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zhang, G. Zimin, N.I. Zito, M. Zuberi, R. Zukanovich Funchal, R. Zumerle, G. Zuniga, J.
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: A study of the fragmentation properties of charm and bottom quarks into D mesons is presented. From 263 700 Z0 hadronic decays collected in 1991 with the DELPHI detector at the LEP collider, D0, D+ and D*+ are reconstructed in the modes K-π+, K-π+K+ and D0π+ followed by D0→K-π+, respectively. The fractional decay widths {Mathematical expression} are determined, and first results are presented for the production of D mesons from {Mathematical expression} and {Mathematical expression} events separately. The average energy fraction of D*± in charm quark fragmentation is found to be 〈XE(D*)〉c=0.487± 0.015 (stat)±0.005 (sys.). Assuming that the fraction of Ds and charm-baryons produced at LEP is similar to that around 10 GeV, the Z0 partial width into charm quark pairs is determined to be Γc/Γh=0.187±0.031 (stat)±0.023 (sys). The probability for a b quark to fragment into {Mathematical expression} or b-baryons is inferred to be 0.268±0.094 (stat)±0.100 (sys) from the measured probability that it fragments into a {Mathematical expression} or B-. © 1993 Springer-Verlag.
Published: 1993

210. Determination of αs using the next-to-leading-log approximation of QCD

Author: Abreu, P. Adam, W. Adye, T. Agasi, E. Aleksan, R. Alekseev, G.D. Algeri, A. Allen, P. Almehed, A. Alvsvaag, S.J. Amaldi, U. Andreazza, A. Antilogus, P. Apel, W.-D. Apsimon, R.J. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barate, R. Barbiellini, G. Bardin, D.Y. Barker, G.J. Baroncelli, A. Barring, O. Barrio, J.A. Bartl, W. Bates, M.J. Battaglia, M. Baubillier, M. Becks, K.-H. Beeston, C.J. Begalli, M. Beilliere, P. Belokopyptov, Yu. Beltran, P. Benedic, D. Benvenuti, A.C. Berggren, M. Bertrand, D. Bianchi, F. Bilenky, M.S. Billoir, P. Bjarne, J. Bloch, D. Blyth, S. Bocci, V. Bogolubov, P.N. Bolognese, T. Bonesini, M. Bonivento, W. Booth, P.S.L. Borisov, G. Borner, H. Bosio, C. Bostjancic, B. Bosworth, S. Botner, O. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Bozzo, M. Braibant, S. Branchini, P. Brand, K.D. Brenner, R.A. Briand, H. Bricman, C. Brown, R.C.A. Brummer, N. Brunet, J.-M. Bugge, L. Buran, T. Burmeister, H. Buytaert, J.A.M.A. Caccia, M. Calvi, M. Camacho Rozas, A.J. Campion, R. Camporesi, T. Canale, V. Cao, F. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Cerrito, L. Chabaud, V. Chan, A. Chapkin, M. Charpentier, Ph. Chaussard, L. Chauveau, J. Checchia, P. Chelkov, G.A. Chevalier, L. Chliapnikov, P. Chorowicz, V. Chrin, J.T.M. Clara, M.P. Collins, P. Contreras, J.L. Contri, R. Cortina, E. Cosme, G. Couchot, F. Crawley, H.B. Crennell, D. Crosetti, G. Crozon, M. Cuevas Maestro, J. Czellar, S. Dahl-Jensen, E. Dalmagne, B. Dam, M. Damgaard, G. Darbo, G. Daubie, E. Daum, A. Dauncey, P.D. Davenport, M. David, P. Davies, J. Da Silva, W. Defoix, C. Delpierre, P. Demaria, N. De Angelis, A. De Boeck, H. De Boer, W. De Clerq, C. De Fez Laso, M.D.M. De Groot, N. De La Vaissiere, C. De Lotto, B. De Min, A. Dijkstra, H. Di Ciaccio, L. Djama, F. Dolbeau, J. Donszelmann, M. Doroba, K. Dracos, M. Drees, J. Dris, M. Dufour, Y. Dupont, F. Eek, L.-O. Eerola, P.A.-M. Ehret, R. Ekelof, T. Ekspong, G. Elliot Peisert, A. Engel, J.-P. Ershaidat, N. Fassouliotis, D. Feindt, M. Fernandez Alonso, M. Ferrer, A. Filippas, T.A. Firestone, A. Foeth, H. Fokitis, E. Fontanelli, F. Forbes, K.A.J. Fousset, J.-L. Francon, S. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Furnival, K. Furstenau, H. Fuster, J. Gamba, D. Garcia, C. Garcia, J. Gaspar, C. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gerber, J.-P. Giacomelli, P. Gokieli, R. Golob, B. Golovatyuk, V.M. Gomez Y Cadenas, J.J. Goobar, A. Gopal, G. Gorski, M. Gracco, V. Grant, A. Grard, F. Graziani, E. Grosdidier, G. Gross, E. Grosse-Wiesmann, P. Grossetete, B. Guy, J. Haedinger, U. Hahn, F. Hahn, M. Haider, S. Hajduk, Z. Hakansson, A. Hallgren, A. Hamacher, K. Hamel De Monchenault, G. Hao, W. Harris, F.J. Hedberg, V. Henkes, T. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Hietanen, I. Higgins, C.O. Higon, E. Hilke, H.J. Hodgson, S.D. Hofmokl, T. Holmes, R. Holmgren, S.-O. Holthuizen, D. Honore, P.F. Hooper, J.E. Houlden, M. Hrubec, J. Huet, K. Hulth, P.O. Hultqvist, K. Ioannou, P. Iversen, P.-S. Jackson, J.N. Jalocha, P. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Johnson, D. Jonker, M. Jonsson, L. Juillot, P. Kalkanis, G. Kalmus, G. Kapusta, F. Karlsson, M. Karvelas, E. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kesteman, J. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, N.J. Klein, H. Klovning, A. Kluit, P. Koch-Mehrin, A. Koehne, J.H. Koene, B. Kokkinias, P. Koratzinos, M. Korcyl, H. Korytov, A.V. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Kramer, P.H. Krolikowski, J. Kronkvist, I. Kruener-Marquis, U. Kucewicz, W. Kulka, K. Kurvinen, K. Lacasta, C. Lambropoulos, C. Lamsa, J.W. Lanceri, L. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Leitner, R. Lemoigne, Y. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Levy, J.M. Lieb, E. Liko, D. Lindgren, J. Lindner, R. Lipniacka, A. Lippi, I. Loerstad, B. Lokajicek, M. Loken, J.G. Lopez-Fernandez, A. Lopez Aguera, M.A. Los, M. Loukas, D. Lozano, J.J. Lutz, P. Lyons, L. Maehlum, G. Maillard, J. Maio, A. Maltezos, A. Mandl, F. Marco, J. Margoni, M. Marin, J.-C. Markou, A. Maron, T. Marti, S. Mathis, L. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Meola, G. Meroni, C. Meyer, W.T. Michelotto, M. Mikulec, I. Mirabito, L. Mitaroff, W.A. Mitselmakher, G.V. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Morettini, P. Mueller, H. Murray, W.J. Myatt, G. Navarria, F.L. Negri, P. Nicolaidou, R. Nielsen, B.S. Nijjhar, B. Nikolaenko, V. Nilsen, P.E.S. Niss, P. Nomerotski, A. Obraztsov, V. Olshevski, A.G. Orava, R. Ostankov, A. Osterberg, K. Ouraou, A. Paganoni, M. Pain, R. Palka, H. Papadopoulou, T. Pape, L. Parodi, F. Passeri, A. Pegoraro, M. Pennanen, J. Peralta, L. Perevozchikov, V. Pernegger, H. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Pierre, F. Pimenta, M. Pingot, O. Plaszczynski, S. Podobrin, O. Pol, M.E. Polok, G. Poropat, P. Privitera, P. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, M. Ridky, J. Rinaudo, G. Roditi, I. Romero, A. Roncagliolo, I. Ronchese, P. Ronnqvist, C. Rosenberg, E.I. Rossi, S. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann-Kleider, V. Ruiz, A. Saarikko, H. Sacquin, Y. Sajot, G. Salt, J. Sanchez, J. Sannino, M. Schael, S. Schneider, H. Schulze, B. Schyns, M.A.E. Sciolla, G. Scuri, F. Segar, A.M. Seitz, A. Sekulin, R. Sessa, M. Sette, G. Seufert, R. Shellard, R.C. Siccama, I. Siegrist, P. Simonetti, S. Simonetto, F. Sisakian, A.N. Skjevling, G. Smadja, G. Smirnov, N. Smith, G.R. Sosnowski, R. Souza-Santos, D. Spassoff, T.S. Spiriti, E. Squarcia, S. Staeck, H. Stanescu, C. Stapnes, S. Stavropoulos, G. Stichelbaut, F. Stocchi, A. Strauss, J. Straver, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Szymanski, P. Tabarelli, T. Tchikilev, O. Theodosiou, G.E. Tilquin, A. Timmermans, J. Timofeev, V.G. Tkatchev, L.G. Todorov, T. Toet, D.Z. Toker, O. Tome, B. Torassa, E. Tortora, L. Treille, D. Trevisian, U. Trischuk, W. Tristram, G. Troncon, C. Tsirou, A. Tsyganov, E.N. Turluer, M.-L. Tuuva, T. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Ueberschaer, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Valls Ferrer, J.A. Vander Velde, C. Van Apeldoorn, G.W. Van Dam, P. Van Der Heijden, M. Van Doninck, W.K. Vaz, P. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Vilanova, D. Vincent, P. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vollmer, M. Voutilainen, M. Vrba, V. Wahlen, H. Walck, C. Waldner, F. Wayne, M. Wehr, A. Weierstall, M. Weilhammer, P. Werner, J. Wetherell, A.M. Wickens, J.H. Wilkinson, G.R. Williams, W.S.C. Winter, M. Witek, M. Wormser, G. Woschnagg, K. Yamdagni, N. Yepes, P. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zhang, G. Zimin, N.I. Zito, M. Zuberi, R. Zukanovich Funchal, R. Zumerle, G. Zuniga, J.
Subjects: High Energy Physics::Experiment
Abstract: A new measurement of αs is obtained from the distributions in thrust, heavy jet mass, energy-energy correlation and two recently introduced jet broadening variables following a method proposed by Catani, Trentadue, Turnock and Webber. This method includes the full calculation of O(s2) terms and leading and next-to-leading logarithms resummed to all orders of αs. The analysis is based on data taken with the DELPHI detector at LEP during 1991. I its found that the inclusion of the resummed leading and next-to-leading logarithms reduces the scale dependence of αs and allows an extension of the fit range towards the infrared limit of the kinematical range. The combined value for αs obtained at the scale μ2=MZ2 is: Mathematical expression © 1993 Springer-Verlag.
Published: 1993

211. Measurement of the triple-gluon vertex from 4-jet events at LEP

Author: Abreu, P. Adam, W. Adye, T. Agasi, E. Aleksan, R. Alekseev, G.D. Algeri, A. Allen, P. Almehed, S. Alsvaag, S.J. Amaldi, U. Andreazza, A. Antilogus, P. Apel, W.-D. Apsimon, R.J. Arnoud, Y. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barate, R. Barbiellini, G. Bardin, D.Y. Barker, G.J. Baroncelli, A. Barring, O. Barrio, J.A. Bartl, W. Bates, M.J. Battaglia, M. Baubillier, M. Becks, K.-H. Beeston, C.J. Begalli, M. Beilliere, P. Belokopytov, Yu. Beltran, P. Benedic, D. Benvenuti, A.C. Berggren, M. Bertrand, D. Bianchi, F. Bilenky, M.S. Billoir, P. Bjarne, J. Bloch, D. Blyth, S. Bocci, V. Bogolubov, P.N. Bolognese, T. Bonesini, M. Bonivento, W. Booth, P.S.L. Borisov, G. Borner, H. Bosio, C. Bostiancic, B. Bosworth, S. Botner, O. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Bozzo, M. Braibant, S. Branchini, P. Brand, K.D. Brenner, R.A. Briand, H. Bricman, C. Brown, R.C.A. Brummer, N. Brunet, J.-M. Bugge, L. Buran, T. Burmeister, H. Buytaert, J.A.M.A. Caccia, M. Calvi, M. Camacho Rozas, A.J. Campion, R. Camporesi, T. Canale, V. Cao, F. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Cerrito, L. Chabaud, V. Chan, A. Chapkin, M. Charpentier, Ph. Chaussard, L. Chauveau, J. Checchia, P. Chelkov, G.A. Chevalier, L. Chliapnikov, P. Chorowicz, V. Chrin, J.T.M. Collins, P. Contreras, J.L. Contri, R. Cortina, E. Cosme, G. Couchot, F. Crawley, H.B. Crennell, D. Crosetti, G. Crozon, M. Cuevas Maestro, J. Czellar, S. Dahl-Jensen, E. Dalmagne, B. Dam, M. Damgaard, G. Darbo, G. Daubie, E. Daum, A. Dauncey, P.D. Davenport, M. David, P. Davies, J. Da Silva, W. Defoix, C. Delpierre, P. Demaria, N. De Angelis, A. De Boeck, H. De Boer, W. De Clerq, C. De Fez Laso, M.D.M. De Groot, N. De La Vaissiere, C. De Lotto, B. De Min, A. Dijkstra, H. Di Ciaccio, L. Dolbeau, J. Donszelmann, M. Doroba, K. Dracos, M. Drees, J. Dris, M. Dufour, Y. Dupont, F. Edsall, D. Eek, L.-O. Eerola, P.A.-M. Ehret, R. Ekelof, T. Ekspong, G. Elliot Peisert, A. Engel, J.-P. Ershaidat, N. Fassouliotis, D. Feindt, M. Fernandez Alonso, M. Ferrer, A. Filippas, T.A. Firestone, A. Foeth, H. Fokitis, E. Fontanelli, F. Forbes, K.A.J. Fousset, J.-L. Francon, S. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Furnival, K. Furstenau, H. Fuster, J. Gamba, D. Garcia, C. Garcia, J. Gaspar, C. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gerber, J.-P. Giacomelli, P. Gokieli, R. Golob, B. Golovatyuk, V.M. Cadenas, J.J.G.Y. Gopal, G. Gorski, M. Gracco, V. Grant, A. Grard, F. Graziani, E. Grosdidier, G. Gross, E. Grosse-Wiesmann, P. Grossetete, B. Guy, J. Haedinger, U. Hahn, F. Hahn, M. Haider, S. Hakansson, A. Hallgren, A. Halpaap, M. Hamacher, K. De Monchenault, G.H. Hao, W. Harris, F.J. Hedberg, V. Henkes, T. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Hietanen, I. Higgins, C.O. Higon, E. Hilke, H.J. Hodgson, S.D. Hofmokl, T. Holmes, R. Holmgren, S.-O. Holthuizen, D. Honore, P.F. Hooper, J.E. Houlden, M. Hrubec, J. Huet, K. Hulth, P.O. Hultqvist, K. Ioannou, P. Iversen, P.-S. Jackson, J.N. Jalocha, P. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Johnson, D. Jonker, M. Jonsson, L. Juillot, P. Kalkanis, G. Kalmus, G. Kapusta, F. Karlsson, M. Karvelas, E. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kesteman, J. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, N.J. Klein, H. Klovning, A. Kluit, P. Koch-Mehrin, A. Koehne, J.H. Koene, B. Kokkinias, P. Koratzinos, M. Korytov, A.V. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Kramer, P.H. Krolikowski, J. Kronkvist, I. Kruener-Marquis, U. Krupinski, W. Kulka, K. Kurvinen, K. Lacasta, C. Lambropoulos, C. Lamsa, J.W. Lanceri, L. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Leitner, R. Lemoigne, Y. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Levy, J.M. Lieb, E. Liko, D. Lindgren, J. Lindner, R. Lipniacka, A. Lippi, I. Loerstad, B. Lokajicek, M. Loken, J.G. Lopez-Fernandez, A. Aguera, M.A.L. Los, M. Loukas, D. Lozano, J.J. Lutz, P. Lyons, L. Maehlum, G. Maillard, J. Maio, A. Maltezos, A. Mandl, F. Marco, J. Margoni, M. Marin, J.-C. Markou, A. Maron, T. Marti, S. Mathis, L. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Meola, G. Meroni, C. Meyer, W.T. Michelotto, M. Mikulec, I. Mirabito, L. Mitaroff, W.A. Mitselmakher, G.V. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Morettini, P. Mueller, H. Murray, W.J. Muryn, B. Myatt, G. Navarria, F.L. Negri, P. Nicolaidou, R. Nielsen, B.S. Nijjhar, B. Nikolaenko, V. Nilsen, P.E.S. Niss, P. Nomerotski, A. Obraztsov, V. Olshevski, A.G. Orava, R. Ostankov, A. Osterberg, K. Ouraou, A. Paganoni, M. Pain, R. Palka, H. Papadopoulou, Th.D. Pape, L. Parodi, F. Passeri, A. Pegoraro, M. Pennanen, J. Peralta, L. Perevozchikov, V. Pernegger, H. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Pierre, F. Pimenta, M. Pingot, O. Plaszczynski, S. Podobrin, O. Pol, M.E. Polok, G. Poropat, P. Pozdniakov, V. Privitera, P. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Ratoff, P.N. Read, A.L. Rebecchi, P. Redaelli, N.G. Regler, M. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, M. Ridky, J. Rinaudo, G. Roditi, I. Romero, A. Roncagliolo, I. Ronchese, P. Ronnqvist, C. Rosenberg, E.I. Rossi, S. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann-Kleider, V. Ruiz, A. Rybicki, K. Saarikko, H. Sacquin, Y. Sajot, G. Salt, J. Sanchez, J. Sannino, M. Schael, S. Schneider, H. Schyns, M.A.E. Sciolla, G. Scuri, F. Segar, A.M. Seitz, A. Sekulin, R. Sessa, M. Sette, G. Seufert, R. Shellard, R.C. Siccama, I. Siegrist, P. Simonetti, S. Simonetto, F. Sisakian, A.N. Skjevling, G. Smadja, G. Smirnov, N. Smirnova, O. Smith, G.R. Sosnowski, R. Souza-Santos, D. Spassoff, T.S. Spiriti, E. Squarcia, S. Staeck, H. Stanescu, C. Stapnes, S. Stavropoulos, G. Stichelbaut, F. Stocchi, A. Strauss, J. Straver, J. Strub, R. Stugu, B. Szczekowski, M. Szeptycka, M. Szymanski, P. Tabarelli, T. Tchikilev, O. Theodosiou, G.E. Tilquin, A. Timmermans, J. Timofeev, V.G. Tkatchev, L.G. Todorov, T. Toet, D.Z. Toker, O. Tome, B. Torassa, E. Tortora, L. Treille, D. Trevisan, U. Trischuk, W. Tristram, G. Troncon, C. Tsirou, A. Tsyganov, E.N. Turala, M. Turluer, M.-L. Tuuva, T. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Ueberschaer, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Valls Ferrer, J.A. Vander Velde, C. Van Apeldoorn, G.W. Van Dam, P. Van Der Heijden, M. Van Doninck, W.K. Vaz, P. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Verlato, M. Vertogradov, L.S. Vilanova, D. Vincent, P. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vollmer, M. Voutilainen, M. Vrba, V. Wahlen, H. Walck, C. Waldner, F. Wayne, M. Wehr, A. Weierstall, M. Weilhammer, P. Werner, J. Wetherell, A.M. Wickens, J.H. Wilkinson, G.R. Williams, W.S.C. Winter, M. Witek, M. Wormser, G. Woschnagg, K. Yamdagni, N. Yepes, P. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zhang, G. Zimin, N.I. Zito, M. Zuberi, R. Funchal, R.Z. Zumerle, G. Zuniga, J.
Subjects: High Energy Physics::Lattice, High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: From the combined data of 1990 and 1991 of the DELPHI experiment at LEP, 13057 4-jet events are obtained and used for determining the contribution of the triple-gluon vertex. The relevant variables are the generalized Nachtmann Reiter angle θNR* and the opening angle of the two least energetic jets. A fit to their two-dimensional distribution yields Mathematical expression where CA/CF is the ratio of the coupling strength of the triple-gluon vertex to that of gluon bremsstrahlung from quarks, and NC/NA, the ratio of the number of quark colours to the number of gluons. This constitutes a convincing model-independent proof of the existence of the triple-gluon vertex, since its contribution is directly proportional to CA/CF. The results are in agreement with the values expected from QCD:CA/CF=2.25, and NC/NA=3/8. © 1993 Springer-Verlag.
Published: 1993

212. A Study of B(0)-(b)over-bar(0) Mixing Using Semileptonic Decays of B-hadrons Produced From Z(0)

Author: Abreu, P., Adam, W., Adye, T., Agasi, E., Aleksan, R., Alekseev, G. D., Algeri, A., Allen, P., Almehed, S., Alvsvaag, S. J., Amaldi, U., Anassontzis, E. G., Andreazza, A., Antilogus, P., Apel, W. D., Apsimon, R. J., Arnoud, Y., Asman, B., Augustin, J. E., Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, G., Bardin, D. Y., Barker, G., Baroncelli, A., Barring, O., Barrio, J. A., Bartl, W., Bates, M. J., Battaglia, M., Baubillier, M., Becks, K. H., Beeston, C. J., Begalli, M., Beilliere, P., Belokopytov, Y., Beltran, P., Benedic, D., Benvenuti, A. C., Berggren, M., Bertrand, D., Bianchi, F., Bilenky, M. S., Billoir, P., Bjarne, J., Bloch, D., Blyth, S., Bocci, V., Bogolubov, P. N., Bolognese, T., Bonesini, M., Bonivento, W., P. S. L., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Bosworth, S., Botner, O., Boudinov, E., Bouquet, B., Bourdarios, C., T. J. V., Bozzo, M., Braibant, S., Branchini, P., Brand, K. D., Brenner, R. A., Briand, H., Bricman, C., R. C. A., Brummer, N., Brunet, J. M., Bugge, L., Buran, T., Burmeister, H., J. A. M., Caccia, M., Calvi, M., A. J. C., Campion, R., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., Caso, C., M. V. C., Cattai, A., Cavallo, F. R., Cerrito, L., Chabaud, V., Chan, A., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, G. A., Chevalier, L., Chliapnikov, P., Chorowicz, V., J. T. M., Clara, M. P., Collins, P., Contreras, J. L., Contri, R., Cortina, E., Cosme, G., Couchot, F., Crawley, H. B., Crennell, D., Crosetti, G., Crozon, M., Maestro, J. C., Czellar, S., Dahljensen, E., Dalmagne, B., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Daum, A., Dauncey, P. D., Davenport, M., David, P., Davies, J., Dasilva, W., Defoix, C., Delikaris, D., Delorme, S., Delpierre, P., Demaria, N., Deangelis, A., Deboeck, H., Deboer, W., Declercq, C., M. D. M., Degroot, N., Delavaissiere, C., Delotto, B., Demin, A., Dijkstra, H., Diciaccio, L., Djama, F., Dolbeau, J., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Dupont, F., Eek, L. O., P. A. M., Ehret, R., Ekelof, T., Ekspong, G., Peisert, A. E., Engel, J. P., Ershaidat, N., Fassouliotis, D., Feindt, M., Alonso, M. F., Ferrer, A., Filippas, T. A., Firestone, A., Foeth, H., Fokitis, E., Fontanelli, F., K. A. J., Fousset, J. L., Francon, S., Franek, B., Frenkiel, P., Fries, D. C., Frodesen, A. G., Fruhwirth, R., Fuldaquenzer, F., Furnival, K., Furstenau, H., Fuster, J., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, E. N., Gerber, J. P., Giacomelli, P., Gokieli, R., Golob, B., Golovatyuk, V. M., J. J. G., Goobar, A., Gopal, G., Gorski, M., Gracco, V., Grant, A., Grard, F., Graziani, E., Grosdidier, G., Gross, E., Grossewiesmann, P., Grossetete, B., Gumenyuk, S., Guy, J., Haedinger, U., Hahn, F., Hahn, M., Haider, S., Hakansson, A., Hallgren, A., Hamacher, K., Demonchenault, G. H., Hao, W., Harris, F. J., Henkes, T., Hernandez, J. J., Herquet, P., Herr, H., Hessing, T. L., Hietanen, I., Higgins, C. O., Higon, E., Hilke, H. J., Hodgson, S. D., Hofmokl, T., Holmes, R., Holmgren, S. O., Holthuizen, D., Honore, P. F., Hooper, J. E., Houlden, M., Hrubec, J., Huet, K., Hulth, P. O., Hultqvist, K., Ioannou, P., Isenhower, D., Iversen, P. S., Jackson, J. N., Jalocha, P., Jarlskog, G., Jarry, P., Jeanmarie, B., Johansson, E. K., Johnson, D., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalmus, G., Kapusta, F., Karlsson, M., Karvelas, E., Katsanevas, S., Katsoufis, E. C., Keranen, R., Kesteman, J., Khomenko, B. A., Khovanski, N. N., King, B., Kjaer, N. J., Klein, H., Klempt, W., Klovning, A., Kluit, P., Kochmehrin, A., Koehne, J. H., Koene, B., Kokkinias, P., Kopf, M., Korytov, A. V., Kostioukhine, V., Kourkoumelis, C., Kouznetsov, O., Kramer, P. H., Krolikowski, J., Kronkvist, I., Kruenermarquis, U., Krupinski, W., Kulka, K., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, J. W., Lanceri, L., Lapin, V., Laugier, J. P., Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Lesiak, T., Levy, J. M., Lieb, E., Liko, D., Lindgren, J., Lindner, R., Lipniacka, A., Lippi, I., Loerstad, B., Lokajicek, M., Loken, J. G., Lopezfernandez, A., M. A. L., Los, M., Loukas, D., Lozano, J. J., Lutz, P., Lyons, L., Maehlum, G., Maillard, J., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, J. C., Markou, A., Maron, T., Marti, S., Mathis, L., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Meola, G., Meroni, C., Meyer, W. T., Michelotto, M., Mikulec, I., Mirabito, L., Mitaroff, W. A., Mitselmakher, G. V., Mjoernmark, U., Moa, T., Moeller, R., Moenig, K., Monge, M. R., Morettini, P., Mueller, H., Murray, W. J., Muryn, B., Myatt, G., Navarria, F. L., Negri, P., Nielsen, B. S., Nijjhar, B., Nikolaenko, V., P. E. S., Niss, P., Obraztsov, V., Olshevski, A. G., Orava, R., Ostankov, A., Osterberg, K., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T. D., Pape, L., Passeri, A., Pegoraro, M., Pennanen, J., Perevozchikov, V., Pernegger, H., Pernicka, M., Perrotta, A., Petridou, C., Petrolini, A., Petrovykh, L., Pettersen, T. E., Pierre, F., Pimenta, M., Pingot, O., Plaszczynski, S., Pol, M. E., Polok, G., Poropat, P., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Rahmani, H., Ratoff, P. N., Read, A. L., Redaelli, N. G., Regler, M., Reid, D., Renton, P. B., Resvanis, L. K., Richard, F., Richardson, M., Ridky, J., Rinaudo, G., Roditi, I., Romero, Alessandra, Roncagliolo, I., Ronchese, P., Ronnqvist, C., Rosenberg, E. I., Rossi, S., Rossi, U., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmannkleider, V., Ruiz, A., Rybicki, K., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, J., Sannino, M., Schael, S., Schneider, H., Schulze, B., M. A. E., Sciolla, G., Scuri, F., Segar, A. M., Sekulin, R., Sessa, M., Sette, G., Seufert, R., Shellard, R. C., Siccama, I., Siegrist, P., Simonetti, S., Simonetto, F., Sisakian, A. N., Skjevling, G., Smadja, G., Smith, G. R., Sosnowski, R., Souzasantos, D., Spassoff, T. S., Spiriti, E., Squarcia, S., Staeck, H., Stanescu, C., Stapnes, S., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Straver, J., Strub, R., Stugu, B., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tchikilev, O., Theodosiou, G. E., Tilquin, A., Timmermans, J., Timofeev, V. G., Tkatchev, L. G., Todorov, T., Toet, D. Z., Toker, O., Torassa, E., Tortora, L., Treille, D., Trevisan, U., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, E. N., Turala, M., Turluer, M. L., Tuuva, T., Tyapkin, I. A., Tyndel, M., Tzamarias, S., Ueberschaer, S., Ullaland, O., Uvarov, V., Valenti, G., Vallazza, E., J. A. V., Vandervelde, C., Vanapeldoorn, G. W., Vandam, P., Vanderheijden, M., Vandoninck, W. K., Vaz, P., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Vertogradov, L. S., Vilanova, D., Vincent, P., Vitale, L., Vlasov, E., Vodopyanov, A. S., Vollmer, M., Voulgaris, G., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wayne, M., Wehr, A., Weierstall, M., Weilhammer, P., Werner, J., Wetherell, A. M., Wickens, J. H., Wilkinson, G. R., W. S. C., Winter, M., Witek, M., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zhang, G., Zimin, N. I., Zito, M., Zuberi, R., Funchal, R. Z., Zumerle, G., and Zuniga, J.
Subjects: LUND MONTE-CARLO, JET FRAGMENTATION, E+E-PHYSICS, COLLIDER
Published: 1993

213. A measurement of B meson production and lifetime using Dl- events in Z0 decays

Author: Abreu, P. Adam, W. Adye, T. Agasi, E. Alekseev, G.D. Algeri, A. Allen, P. Almehed, S. Alvsvaag, S.J. Amaldi, U. Anassontzis, E.G. Andreazza, A. Antilogus, P. Apel, W.-D. Apsimon, R.J. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barate, R. Barbiellini, G. Bardin, D.Y. Barker, G.J. Baroncelli, A. Barring, O. Barrio, J.A. Bartl, W. Bates, M.J. Battaglia, M. Baubillier, M. Becks, K.-H. Beeston, C.J. Begalli, M. Beilliere, P. Belokopytov, Yu. Beltran, P. Benedic, D. Benvenuti, A.C. Berggren, M. Bertrand, D. Bianchi, F. Bilenky, M.S. Billoir, P. Bjarne, J. Bloch, D. Blyth, S. Bocci, V. Bogolubov, P.N. Bolognese, T. Bonesini, M. Bonivento, W. Booth, P.S.L. Borgeaud, P. Borisov, G. Borner, H. Bosio, C. Bostjancic, B. Bosworth, S. Botner, O. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Bozzo, M. Braibant, S. Branchini, P. Brand, K.D. Brenner, R.A. Briand, H. Bricman, C. Brown, R.C.A. Brummer, N. Brunet, J.-M. Bugge, L. Buran, T. Burmeister, H. Buytaert, J.A.M.A. Caccia, M. Calvi, M. Camacho Rozas, A.J. Campion, R. Camporesi, T. Canale, V. Cao, F. Carena, F. Carroll, L. Caso, C. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Cerrito, L. Chabaud, V. Chan, A. Charpentier, Ph. Chaussard, L. Chauveau, J. Checchia, P. Chelkov, G.A. Chevalier, L. Chliapnikov, P. Chorowicz, V. Chrin, J.T.M. Clara, M.P. Collins, P. Contreras, J.L. Contri, R. Cortina, E. Cosme, G. Couchot, F. Crawley, H.B. Crennell, D. Crosetti, G. Crozon, M. Maestro, J.C. Czellar, S. Dahl-Jensen, E. Dalmagne, B. Dam, M. Damgaard, G. Darbo, G. Daubie, E. Daum, A. Dauncey, P.D. Davenport, M. David, P. Davies, J. Da Silva, W. Defoix, C. Delikaris, D. Delorme, S. Delpierre, P. Demaria, N. De Angelis, A. De Beer, M. De Boeck, H. De Boer, W. De Clercq, C. De Fez Laso, M.D.M. De Groot, N. De La Vaissiere, C. De Lotto, B. De Min, A. Dijkstra, H. Di Ciaccio, L. Djama, F. Dolbeau, J. Donszelmann, M. Doroba, K. Dracos, M. Drees, J. Dris, M. Dufour, Y. Eek, L.-O. Eerola, P.A.-M. Ehret, R. Ekelof, T. Ekspong, G. Elliot Peisert, A. Engel, J.-P. Ershaidat, N. Fassouliotis, D. Feindt, M. Fernandez Alonso, M. Ferrer, A. Filippas, T.A. Firestone, A. Foeth, H. Fokitis, E. Fontanelli, F. Forbes, K.A.J. Fousset, J.-L. Francon, S. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Furnival, K. Furstenau, H. Fuster, J. Galeazzi, G. Gamba, D. Garcia, C. Garcia, J. Gaspar, C. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gerber, J.-P. Giacomelli, P. Gokieli, R. Golob, B. Golovatyuk, V.M. Gomez Y Cadenas, J.J. Goobar, A. Gopal, G. Gorski, M. Gracco, V. Grant, A. Grard, F. Graziani, E. Grosdidier, G. Gross, E. Grosse-Wiesmann, P. Grossetete, B. Gumenyuk, S. Guy, J. Haedinger, U. Hahn, F. Hahn, M. Haider, S. Hakansson, A. Hallgren, A. Hamacher, K. Hamel De Monchenault, G. Hao, W. Harris, F.J. Henkes, T. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Hietanen, I. Higgins, C.O. Higon, E. Hilke, H.J. Hodgson, S.D. Hofmokl, T. Holmes, R. Holmgren, S.-O. Holthuizen, D. Honore, P.F. Hooper, J.E. Houlden, M. Hrubec, J. Huet, K. Hulth, P.O. Hultqvist, K. Ioannou, P. Isenhower, D. Iversen, P.-S. Jackson, J.N. Jalocha, P. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Johnson, D. Jonker, M. Jonsson, L. Juillot, P. Kalkanis, G. Kalmus, G. Kapusta, F. Karlsson, M. Karvelas, E. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kesteman, J. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, N.J. Klein, H. Klempt, W. Klovning, A. Kluit, P. Koch-Mehrin, A. Koehne, J.H. Koene, B. Kokkinias, P. Kopf, M. Korcyl, K. Korytov, A.V. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Kramer, P.H. Krolikowski, J. Kronkvist, I. Kruener-Marquis, U. Krupinski, W. Kulka, K. Kurvinen, K. Lacasta, C. Lambropoulos, C. Lamsa, J.W. Lanceri, L. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Leitner, R. Lemoigne, Y. Lemonne, J. Lenzen, G. Lepeltier, V. Lesiak, T. Levy, J.M. Lieb, E. Liko, D. Lindgren, J. Lindner, R. Lipniacka, A. Lippi, I. Loerstad, B. Lokajicek, M. Loken, J.G. Lopez-Fernandez, A. Lopez Aguera, M.A. Los, M. Loukas, D. Lozano, J.J. Lutz, P. Lyons, L. Maehlum, G. Maillard, J. Maltezos, A. Mandl, F. Marco, J. Margoni, M. Marin, J.-C. Markou, A. Maron, T. Marti, S. Mathis, L. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. Meola, G. Meroni, C. Meyer, W.T. Michelotto, M. Mikulec, I. Mirabito, L. Mitaroff, W.A. Mitselmakher, G.V. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Morettini, P. Mueller, H. Murray, W.J. Muryn, B. Myatt, G. Navarria, F.L. Negri, P. Nielsen, B.S. Nijjhar, B. Nikolaenko, V. Nilsen, P.E.S. Niss, P. Obraztsov, V. Olshevski, A.G. Orava, R. Ostankov, A. Osterberg, K. Ouraou, A. Paganoni, M. Pain, R. Palka, H. Papadopoulou, Th.D. Pape, L. Passeri, A. Pegoraro, M. Pennanen, J. Perevozchikov, V. Pernicka, M. Perrotta, A. Petridou, C. Petrolini, A. Petrovykh, L. Pettersen, T.E. Pierre, F. Pimenta, M. Pingot, O. Plaszczynski, S. Pol, M.E. Polok, G. Poropat, P. Privitera, P. Pullia, A. Radojicic, D. Ragazzi, S. Rahmani, H. Ratoff, P.N. Read, A.L. Redaelli, N.G. Regler, M. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, M. Ridky, J. Rinaudo, G. Roditi, I. Romero, A. Roncagliolo, I. Ronchese, P. Ronnqvist, C. Rosenberg, E.I. Rossi, S. Rossi, U. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann-Kleider, V. Ruiz, A. Rybicki, K. Saarikko, H. Sacquin, Y. Sajot, G. Salt, J. Sanchez, J. Sannino, M. Schael, S. Schneider, H. Schulze, B. Schyns, M.A.E. Sciolla, G. Scuri, F. Segar, A.M. Sekulin, R. Sessa, M. Sette, G. Seufert, R. Shellard, R.C. Siccama, I. Siegrist, P. Simonetti, S. Simonetto, F. Sisakian, A.N. Skaali, T.B. Skjevling, G. Smadja, G. Smith, G.R. Sosnowski, R. Spassoff, T.S. Spiriti, E. Squarcia, S. Staeck, H. Stanescu, C. Stapnes, S. Stavropoulos, G. Stichelbaut, F. Stocchi, A. Strauss, J. Straver, J. Strub, R. Szczekowski, M. Szeptycka, M. Szymanski, P. Tabarelli, T. Tavernier, S. Tchikilev, O. Theodosiou, G.E. Tilquin, A. Timmermans, J. Timofeev, V.G. Tkatchev, L.G. Todorov, T. Toet, D.Z. Toker, O. Torassa, E. Tortora, L. Treille, D. Trevisan, U. Trischuk, W. Tristram, G. Troncon, C. Tsirou, A. Tsyganov, E.N. Turala, M. Turluer, M.-L. Tuuva, T. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Ueberschaer, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Valls Ferrer, J.A. Vander Velde, C. Van Apeldoorn, G.W. Van Dam, P. Van Der Heijden, M. Van Doninck, W.K. Vaz, P. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Vertogradov, L.S. Vilanova, D. Vincent, P. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vollmer, M. Voulgaris, G. Voutilainen, M. Vrba, V. Wahlen, H. Walck, C. Waldner, F. Wayne, M. Wehr, A. Weierstall, M. Weilhammer, P. Werner, J. Wetherell, A.M. Wickens, J.H. Wikne, J. Wilkinson, G.R. Williams, W.S.C. Winter, M. Witek, M. Wormald, D. Wormser, G. Woschnagg, K. Yamdagni, N. Yepes, P. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zhang, G. Zimin, N.I. Zito, M. Zuberi, R. Zukanovich Funchal, R. Zumerle, G. Zuniga, J.
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: A study of B meson decays into DlX final states is presented. In these events, neutral and charged D mesons originate predominantly from B+ and B0 decays, respectively. The dilution of this correlation due to D** production has been taken into account. From 263 700 hadronic Z0 decays collected in 1991 with the DELPHI detector at the LEP collider, 92 D0→K-π+, 35 D+→K-π+π+ and 61 D*0→D0π+ followed by D0→K-π+ or D0→K-π+π+π -, are found with an associated lepton of the same charge as the kaon. From the D0l- and D*+l-, the probability fd that a b quark hadronizes into a B- (or {Mathematical expression}) meson is found to be 0.44 ±0.08±0.09, corresponding to a total (Bs+Λb) hadronization fraction of 0.12-0.12+0.24. By reconstructing the energy of each B meson, the b quark fragmentation is directly measured for the first time. The mean value of the B meson energy fraction is: {Mathematical expression} Reconstructing D-lepton vertices, the following B lifetimes are measured: {Mathematical expression} and an average τ(B)=1.23-0.13+0.14(stat.)±0.15(syst.) ps is found. Allowing for decays into {Mathematical expression}, the B+ and B0 lifetimes are: {Mathematical expression} © 1993 Springer-Verlag.
Published: 1993

214. Search For Z(0) Decays To 2 Leptons and A Charged-particle Antiparticle Pair

Author: Abreu, P, Adam, W, Adye, T, Agasi, E, Aleksan, R, Alekseev, Gd, Algeri, A, Allen, P, Almehed, S, Alvsvaag, Sj, Amaldi, U, Andreazza, A, Antilogus, P, Apel, Wd, Apsimon, Rj, Arnoud, Y, Asman, B, Augustin, Je, Augustinus, A, Baillon, P, Bambade, P, Barao, F, Barate, R, Barbiellini, G, Bardin, Dy, Barker, Gj, Baroncelli, A, Barring, O, Barrio, Ja, Bartl, W, Bates, Mj, Battaglia, M, Baubillier, M, Becks, Kh, Beeston, Cj, Begalli, M, Beilliere, P, Belokopytov, Y, Beltran, P, Benedic, D, Benvenuti, Ac, Berggren, M, Bertrand, D, Bianchi, F, Bilenky, Ms, Billoir, P, Bjarne, J, Bloch, D, Blyth, S, Bocci, V, Bogolubov, Pn, Bolognese, T, Bonesini, M, Bonivento, W, Booth, Psl, Borisov, G, Borner, H, Bosio, C, Bostjancic, B, Bosworth, S, Botner, O, Boudinov, E, Bouquet, B, Bourdarios, C, Bowcock, Tjv, Bozzo, M, Braibant, S, Branchini, P, Brand, Kd, Brenner, Ra, Briand, H, Bricman, C, Brown, Rca, Brummer, N, Brunet, Jm, Bugge, L, Buran, T, Burmeister, H, Buytaert, Jama, Caccia, M, Calvi, M, Rozas, Ajc, Campion, R, Camporesi, T, Canale, V, Cao, F, Carena, F, Carroll, L, Caso, C, Gimenez, Mvc, Cattai, A, Cavallo, Fr, Cerrito, L, Chabaud, V, Chan, A, Charpentier, P, Chaussard, L, Chauveau, J, Checchia, P, Chelkov, Ga, Chevalier, L, Chliapnikov, P, Chorowicz, V, Chrin, Jtm, Collins, P, Contreras, Jl, Contri, R, Cortina, E, Cosme, G, Couchot, F, Crawley, Hb, Crennell, D, Crosetti, G, Crozon, M, Maestro, Jc, Czellar, S, Dahljensen, E, Dalmagne, B, Dam, M, Damgaard, G, Darbo, G, Daubie, E, Daum, A, Dauncey, Pd, Davenport, M, David, P, Davies, J, Dasilva, W, Defoix, C, Delpierre, P, Demaria, N, Deangelis, A, Deboeck, H, Deboer, W, Declercq, C, Laso, Mdmd, Degroot, N, Delavaissiere, C, DE LOTTO, Barbara, Demin, A, Dijkstra, H, Diciaccio, L, Dolbeau, J, Donszelmann, M, Doroba, K, Dracos, M, Drees, J, Dris, M, Dufour, Y, Dupont, F, Edsall, D, Eek, Lo, Eerola, Pam, Ehret, R, Ekelof, T, Ekspong, G, Peisert, Ae, Engel, Jp, Ershaidat, N, Fassouliotis, D, Feindt, M, Alonso, Mf, Ferrer, A, Filippas, Ta, Firestone, A, Foeth, H, Fokitis, E, Fontanelli, F, Forbes, Kaj, Fousset, Jl, Francon, S, Franek, B, Frenkiel, P, Fries, Dc, Frodesen, Ag, Fruhwirth, R, Fuldaquenzer, F, Furnival, K, Furstenau, H, Fuster, J, Gamba, D, Garcia, C, Garcia, J, Gaspar, C, Gasparini, U, Gavillet, P, Gazis, En, Gerber, Jp, Giacomelli, P, Gokieli, R, Golob, B, Golovatyuk, Vm, Gomez, Jj, Cadenas, Y, Gopal, G, Gorn, L, Gorski, M, Gracco, V, Grant, A, Grard, F, Graziani, E, Grosdidier, G, Gross, E, Grossewiesmann, P, Grossetete, B, Gumenyuk, S, Guy, J, Haedinger, U, Hahn, F, Hahn, M, Haider, S, Hakansson, A, Hallgren, A, Hamacher, K, Demonchenault, Gh, Hao, W, Harris, Fj, Hedberg, V, Henkes, T, Hernandez, Jj, Herquet, P, Herr, H, Hessing, Tl, Hietanen, I, Higgins, Co, Higon, E, Hilke, Hj, Hodgson, Sd, Hofmokl, T, Holmgren, So, Holthuizen, D, Honore, Pf, Hooper, Je, Houlden, M, Hrubec, J, Huet, K, Hulth, Po, Hultqvist, K, Ioannou, P, Iversen, Ps, Jackson, Jn, Jalocha, P, Jarlskog, G, Jarry, P, Jeanmarie, B, Johansson, Ek, Johnson, D, Jonker, M, Jonsson, L, Juillot, P, Kalkanis, G, Kalmus, G, Kapusta, F, Karlsson, M, Karvelas, E, Katsanevas, S, Katsoufis, Ec, Keranen, R, Kesteman, J, Khomenko, Ba, Khovanski, Nn, King, B, Kjaer, Nj, Klein, H, Klovning, A, Kluit, P, Kochmehrin, A, Koehne, Jh, Koene, B, Kokkinias, P, Koratzinos, M, Korytov, Av, Kostioukhine, V, Kourkoumelis, C, Kouznetsov, O, Kramer, Ph, Kreuter, C, Krolikowski, J, Kronkvist, I, Kruenermarquis, U, Krupinski, W, Kulka, K, Kurvinen, K, Lacasta, C, Lambropoulos, C, Lamsa, Jw, Lanceri, L, Lapin, V, Laugier, Jp, Lauhakangas, R, Leder, G, Ledroit, F, Leitner, R, Lemoigne, Y, Lemonne, J, Lenzen, G, Lepeltier, V, Lesiak, T, Levy, Jm, Lieb, E, Liko, D, Lindgren, J, Lindner, R, Lipniacka, A, Lippi, I, Loerstad, B, Lokajicek, M, Loken, Jg, Lopezfernandez, A, Aguera, Mal, Los, M, Loukas, D, Lozano, Jj, Lutz, P, Lyons, L, Maehlum, G, Maillard, J, Maio, A, Maltezos, A, Mandl, F, Marco, J, Margoni, M, Marin, Jc, Markou, A, Maron, T, Marti, S, Matorras, F, Matteuzzi, C, Matthiae, G, Mazzucato, M, Mccubbin, M, Mckay, R, Mcnulty, R, Meola, G, Meroni, C, Meyer, Wt, Michelotto, M, Mikulec, I, Mirabito, L, Mitaroff, Wa, Mitselmakher, Gv, Mjoernmark, U, Moa, T, Moeller, R, Moenig, K, Monge, Mr, Morettini, P, Mueller, H, Murray, Wj, Muryn, B, Myatt, G, Navarria, Fl, Negri, P, Nicolaidou, R, Nielsen, Bs, Nijjhar, B, Nikolaenko, V, Nilsen, Pes, Niss, P, Nomerotski, A, Obraztsov, V, Olshevski, Ag, Orava, R, Ostankov, A, Osterberg, K, Ouraou, A, Paganoni, M, Pain, R, Palka, H, Papadopoulou, Td, Pape, L, Parodi, F, Passeri, A, Pegoraro, M, Pennanen, J, Peralta, L, Perevozchikov, V, Pernegger, H, Pernicka, M, Perrotta, A, Petridou, C, Petrolini, A, Petrovich, L, Pierre, F, Pimenta, M, Pingot, O, Plaszczynski, S, Podobrin, O, Pol, Me, Polok, G, Poropat, P, Pozdniakov, V, Privitera, P, Pullia, A, Radojicic, D, Ragazzi, S, Rahmani, H, Ratoff, Pn, Read, Al, Rebecchi, P, Redaelli, Ng, Regler, M, Reid, D, Renton, Pb, Resvanis, Lk, Richard, F, Richardson, M, Ridky, J, Rinaudo, G, Roditi, I, Romero, A, Roncagliolo, I, Ronchese, P, Ronnqvist, C, Rosenberg, Ei, Rossi, S, Rosso, E, Roudeau, P, Rovelli, T, Ruckstuhl, W, Ruhlmannkleider, V, Ruiz, A, Rybicki, K, Saarikko, H, Sacquin, Y, Sajot, G, Salt, J, Sanchez, J, Sannino, M, Schael, S, Schneider, H, Schyns, Mae, Sciolla, G, Scuri, Fabrizio, Segar, Am, Seitz, A, Sekulin, R, Sessa, M, Sette, G, Seufert, R, Shellard, Rc, Siccama, I, Siegrist, P, Simonetti, S, Simonetto, F, Sisakian, An, Skjevling, G, Smadja, G, Smirnova, O, Smith, Gr, Sosnowski, R, Souzasantos, D, Spassoff, Ts, Spiriti, E, Squarcia, S, Staeck, H, Stanescu, C, Stapnes, S, Stavropoulos, G, Stichelbaut, F, Stocchi, A, Strauss, J, Straver, J, Strub, R, Stugu, B, Szczekowski, M, Szeptycka, M, Szymanski, P, Tabarelli, T, Tchikilev, O, Theodosiou, Ge, Tilquin, A, Timmermans, J, Timofeev, Vg, Tkatchev, Lg, Todorov, T, Toet, Dz, Toker, O, Tome, B, Torassa, E, Tortora, L, Treille, D, Trevisan, U, Trischuk, W, Tristram, G, Troncon, C, Tsirou, A, Tsyganov, En, Turala, M, Turluer, Ml, Tuuva, T, Tyapkin, Ia, Tyndel, M, Tzamarias, S, Ueberschaer, S, Ullaland, O, Uvarov, V, Valenti, G, Vallazza, E, Ferrer, Jav, Vandervelde, C, Vanapeldoorn, Gw, Vandam, P, Vanderheijden, M, Vandoninck, Wk, Vaz, P, Vegni, G, Ventura, L, Venus, W, Verbeure, F, Verlato, M, Vertogradov, Ls, Vilanova, D, Vincent, P, Vitale, L, Vlasov, E, Vodopyanov, As, Vollmer, M, Voutilainen, M, Vrba, V, Wahlen, H, Walck, C, Waldner, F, Wehr, A, Weierstall, M, Weilhammer, P, Werner, J, Wetherell, Am, Wickens, Jh, Wilkinson, Gr, Williams, Wsc, Winter, M, Witek, M, Wormser, G, Woschnagg, K, Yamdagni, N, Yepes, P, Zaitsev, A, Zalewska, A, Zalewski, P, Zavrtanik, D, Zevgolatakos, E, Zhang, G, Zimin, Ni, Zito, M, Zuberi, R, Funchal, Rz, Zumerle, G, and Zuniga, J.
Subjects: MU+MU, E+E, ENERGIES, MONTE-CARLO SIMULATION, RADIATIVE-CORRECTIONS, FINAL-STATES, Z0 DECAYS, High Energy Physics::Experiment, Computer Science::Information Theory
Abstract: Based on a sample equivalent to 365 000 hadronic Z0 decays, the search in DELPHI data for pairs of leptons accompanied by a pair of charged particles is described. A total of 11 events were found in the electron channel, 9 in the muon channel and 7 in the tau channel. Results on lepton pairs with a radiated photon are also presented. The data from all channels are compatible with the expectations from standard processes. However, one event was found in the tau channel with an unusually high mass of the charged particle pair.
Published: 1993

215. DETERMINATION OF ALPHA(S) FOR B-QUARKS AT THE Z(0) RESONANCE

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSAN, R and ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ and AMALDI, U ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D and BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F and BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M and BONIVENTO, W BOOTH, PSL BORISOV, G BORNER, H BOSIO, C and BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B and BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S and BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C and BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T and BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F and CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A and CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P and CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA and CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM and COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G and COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G and CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DAUBIE, E DAUM, A DAUNCEY, PD and DAVENPORT, M DAVID, P DAVIES, J DASILVA, W DEFOIX, C and DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H and DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N and DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H and DICIACCIO, L DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DUPONT, F EDSALL, D and EEK, LO EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G and PEISERT, AE ENGEL, JP ERSHAIDAT, N FASSOULIOTIS, D and FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A and FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ and FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC and FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K and FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C GARCIA, J and GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM and CADENAS, JJGY GOPAL, G GORSKI, M GRACCO, V GRANT, A and GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E and GROSSEWIESMANN, P GROSSETETE, B GUMENYUK, S GUY, J and HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAKANSSON, A and HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENKES, T HERNANDEZ, JJ HERQUET, P and HERR, H HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E and HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO and HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M and HRUBEC, J HUET, K HULTH, PO HULTQVIST, K IOANNOU, P and IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P and JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M and JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F and KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P and KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P and KORATZINOS, M KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C and KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J KRONKVIST, I and KRUENERMARQUIS, U KRUPINSKI, W KULKA, K KURVINEN, K and LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V and LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F and LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LESIAK, T LEVY, JM LIEB, E LIKO, D LINDGREN, J and LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M and LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G and MAILLARD, J MAIO, A MALTEZOS, A MANDL, F MARCO, J and MARGONI, M MARIN, JC MARKOU, A MARON, T MARTI, S and MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G and MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G and MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I and MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U and MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MURRAY, WJ MURYN, B MYATT, G NAVARRIA, FL and NEGRI, P NICOLAIDOU, R NIELSEN, BS NIJJHAR, B and NIKOLAENKO, V NILSEN, PES NISS, P NOMEROTSKI, A and OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A and OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H and PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PETROVYKH, O and PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P POZDNIAKOV, V and PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REBECCHI, P REDAELLI, NG and REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F and RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A and RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI and ROSSI, S ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W and RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K SAARIKKO, H and SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M and SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F and SEGAR, AM SEITZ, A SEKULIN, R SESSA, M SETTE, G and SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P and SIMONETTI, S SIMONETTO, F SISAKIAN, AN SKJEVLING, G and SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR SOSNOWSKI, R and SOUZASANTOS, D SPASSOFF, TS SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R and STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P and TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOME, B TORASSA, E TORTORA, L TREILLE, D and TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C and TSIROU, A TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T and TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W and VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D and VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M and VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F and WAYNE, M WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WILKINSON, GR WILLIAMS, WSC and WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P and ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M and ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Lattice, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: The strong coupling constant for b quarks has been determined, and its flavour independence, as predicted by QCD, investigated. The analysis involved events with lepton candidates selected from approximately 356 000 hadronic decays of the Z0, collected by the DELPHI detector at LEP in 1990 and 199 1. A method based on a direct comparison of the three-jet fraction in a b enriched sample, selected by requiring leptons with large momenta and transverse momenta, to that of the entire hadronic sample, illustrated the significant effect of the b quark mass on the multi-jet cross section, and verified the flavour independence of the strong coupling constant to an accuracy of +/- 6%. A second procedure based on a fit to the momentum and transverse momentum spectra of the lepton candidates in both two-jet and three (or more)-jet event samples simultaneously determined the b content in each, and, using second order QCD calculations, gave an absolute measurement of alpha(s) for b quarks of 0. 1 18 +/- 0.004 (stat.) +/- 0.003 (syst.) +/- 0.008 (scale). A comparison with a, for all quark flavours, as measured from the three-jet fraction in all hadronic events, further allowed the coupling strength for b quarks to be expressed in terms relative to that for udsc quarks, thereby cancelling certain common systematic uncertainties, and yielded alpha(s)b/alpha(s)udsc = 1.00 +/- 0.04 (stat.) +/- 0.03 (syst.).
Published: 1993

216. Production of Lambda and Lambda(lambda)over-bar Correlations In the Hadronic Decays of the Z(0)

Author: Abreu, P., Adam, W., Adye, T., Agasi, E., Aleksan, R., Alekseev, G. D., Algeri, A., Allen, P., Almehed, S., Alvsvaag, S. J., Amaldi, U., Andreazza, A., Antilogus, P., Apel, W. D., Apsimon, R. J., Arnoud, Y., Asman, B., Augustin, J. E., Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, G., Bardin, D. Y., Barker, G. J., Baroncelli, A., Barring, O., Barrio, J. A., Bartl, W., Bates, M. J., Battaglia, M., Baubillier, M., Becks, K. H., Begalli, M., Beilliere, P., Belokopytov, Y., Beltran, P., Benedic, D., Benvenuti, A. C., Berggren, M., Bertrand, D., Bianchi, Fabrizio, Bilenky, M. S., Billoir, P., Bjarne, J., Bloch, D., Blocki, J., Blyth, S., Bocci, V., Bogolubov, P. N., Bolognese, T., Bonesini, M., Bonivento, W., P. S. L., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Bosworth, S., Botner, O., Boudinov, E., Bouquet, B., Bourdarios, C., T. J. V., Bozzo, M., Braibant, S., Branchini, P., Brand, K. D., Brenner, R. A., Briand, H., Bricman, C., Brillault, L., R. C. A., Bruckman, P., Brunet, J. M., Budziak, A., Bugge, L., Buran, T., Burmeister, H., J. A. M., Caccia, M., Calvi, M., A. J. C., Campion, R., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., M. V. C., Cattai, A., Cavallo, F. R., Cerrito, L., Chabaud, V., Chan, A., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, G. A., Chevalier, L., Chliapnikov, P., Chorowicz, V., J. T. M., Cindro, V., Collins, P., Contreras, J. L., Contri, R., Cortina, E., Cosme, G., Couchot, F., Crawley, H. B., Crennell, D., Crosetti, G., Maestro, J. C., Czellar, S., Dahljensen, E., Dalmagne, B., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Daum, A., Dauncey, P. D., Davenport, M., Davies, J., Dasilva, W., Defoix, C., Delpierre, P., Demaria, N., Deangelis, A., Deboeck, H., Deboer, W., Debrabandere, S., Declercq, C., M. D. M., Delavaissiere, C., Delotto, B., Demin, A., Dijkstra, H., Diciaccio, L., Dolbeau, J., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Dupont, F., Edsall, D., Eek, L. O., P. A. M., Ehret, R., Ekelof, T., Ekspong, G., Peisert, A. E., Elsing, M., Engel, J. P., Ershaidat, N., Santo, M. E., Falaleev, V., Fassouliotis, D., Feindt, M., Ferrer, A., Filippas, T. A., Firestone, A., Foeth, H., Fokitis, E., Fontanelli, F., K. A. J., Fousset, J. L., Francon, S., Franek, B., Frenkiel, P., Fries, D. C., Frodesen, A. G., Fuldaquenzer, F., Furstenau, H., Fuster, J., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, E. N., Gerber, J. P., Giacomelli, P., Gillespie, D., Gokieli, R., Golob, B., Golovatyuk, V. M., J. J. G., Gopal, G., Gorn, L., Gorski, M., Gracco, V., Grant, A., Grard, F., Graziani, E., Grosdidier, G., Gross, E., Grossetete, B., Gumenyuk, S., Guy, J., Haedinger, U., Hahn, F., Hahn, M., Haider, S., Hajduk, Z., Hakansson, A., Hallgren, A., Hamacher, K., Demonchenault, G. H., Hao, W., Harris, F. J., Hedberg, V., Henkes, T., Henriques, R., Hernandez, J. J., Herquet, P., Herr, H., Hessing, T. L., Hietanen, I., Higgins, C. O., Higon, E., Hilke, H. J., Hodgson, S. D., Hofmokl, T., Holmgren, S. O., Holt, P. J., Holthuizen, D., Honore, P. F., Houlden, M., Hrubec, J., Huet, K., Hulth, P. O., Hultqvist, K., Ioannou, P., Iversen, P. S., Jackson, J. N., Jalocha, P., Jarlskog, G., Jarry, P., Jeanmarie, B., Johansson, E. K., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalmus, G., Kapusta, F., Karlsson, M., Karvelas, E., Katsanevas, S., Katsoufis, E. C., Keranen, R., Khomenko, B. A., Khovanski, N. N., King, B., Kjaer, N. J., Klein, H., Klovning, A., Kluit, P., Kochmehrin, A., Koehne, J. H., Koene, B., Kokkinias, P., Koratzinos, M., Korcyl, K., Korytov, A. V., Kostioukhine, V., Kourkoumelis, C., Kouznetsov, O., Kramer, P. H., Krammer, M., Kreuter, C., Krolikowski, J., Kronkvist, I., Kruenermarquis, U., Kucewicz, W., Kulka, K., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, J. W., Lanceri, L., Lapin, V., Last, I., Laugier, J. P., Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Lesiak, T., Levy, J. M., Lieb, E., Liko, D., Lindgren, J., Lindner, R., Lippi, I., Loerstad, B., Lokajicek, M., Loken, J. G., Lopezfernandez, A., M. A. L., Los, M., Loukas, D., Lozano, J. J., Lutz, P., Lyons, L., Maehlum, G., Maillard, J., Maio, A., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, J. C., Markou, A., Maron, T., Marti, S., Martinezrivero, C., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Medbo, J., Meola, G., Meroni, C., Meyer, W. T., Michelotto, M., Mikulec, I., Mirabito, L., Mitaroff, W. A., Mitselmakher, G. V., Mjoernmark, U., Moa, T., Moeller, R., Moenig, K., Monge, M. R., Morettini, P., Mueller, H., Murray, W. J., Myatt, G., Navarria, F. L., Negri, P., Nemecek, S., Nicolaidou, R., Nielsen, B. S., Nijjhar, B., Nikolaenko, V., P. E. S., Niss, P., Nomerotski, A., Obraztsov, V., Olshevski, A. G., Orava, R., Ostankov, A., Osterberg, K., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T. D., Pape, L., Parodi, F., Passeri, A., Pegoraro, M., Pennanen, J., Peralta, L., Pernegger, H., Pernicka, M., Perrotta, A., Petridou, C., Petrolini, A., Piana, G., Pierre, F., Pimenta, M., Plaszczynski, S., Podobrin, O., Pol, M. E., Polok, G., Poropat, P., Pozdniakov, V., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Rahmani, H., Rames, J., Ratoff, P. N., Read, A. L., Rebecchi, P., Redaelli, N. G., Regler, M., Reid, D., Renton, P. B., Resvanis, L. K., Richard, F., Richardson, J., Ridky, J., Rinaudo, G., Roditi, I., Romero, Alessandra, Roncagliolo, I., Ronchese, P., Ronnqvist, C., Rosenberg, E. I., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmannkleider, V., Ruiz, A., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, J., Sannino, M., Schael, S., Schneider, H., M. A. E., Sciolla, G., Scuri, F., Segar, A. M., Seitz, A., Sekulin, R., Sessa, M., Seufert, R., Shellard, R. C., Siccama, I., Siegrist, P., Simonetti, S., Simonetto, F., Sisakian, A. N., Skjevling, G., Smadja, G., Smirnova, O., Smith, G. R., Sosnowski, R., Souzasantos, D., Spassov, T., Spiriti, E., Squarcia, S., Staeck, H., Stanescu, C., Stapnes, S., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Straver, J., Strub, R., Stugu, B., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tchikilev, O., Theodosiou, G. E., Tilquin, A., Timmermans, J., Timofeev, V. G., Tkatchev, L. G., Todorov, T., Toet, D. Z., Toker, O., Tomaradze, A., Tome, B., Torassa, E., Tortora, L., Treille, D., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, E. N., Turluer, M. L., Tuuva, T., Tyapkin, I. A., Tyndel, M., Tzamarias, S., Ueberschaer, S., Ullaland, O., Uvarov, V., Valenti, G., Vallazza, E., J. A. V., Vandervelde, C., Vanapeldoorn, G. W., Vandam, P., Vanderheijden, M., Vandoninck, W. K., Vaneldik, J., Vaz, P., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Verlato, M., Vertogradov, L. S., Vilanova, D., Vincent, P., Vitale, L., Vlasov, E., Vodopyanov, A. S., Vollmer, M., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wehr, A., Weierstall, M., Weilhammer, P., Wetherell, A. M., Wickens, J. H., Wilkinson, G. R., W. S. C., Winter, M., Witek, M., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zanin, M., Zavrtanik, D., Zevgolatakos, E., Zimin, N. I., Zito, M., Zontar, D., Zuberi, R., Zumerle, G., and Zuniga, J.
Subjects: E+E ANNIHILATION, BARYON
Published: 1993

217. DETERMINATION OF ALPHA(S) FOR B-QUARKS AT THE Z(0) RESONANCE

Author: Abreu, P, Adam, W, Adye, T, Agasi, E, Aleksan, Roy, Alekseev, G D, Algeri, A, Allen, P, Almehed, S, Alvsvaag, S J, Amaldi, Ugo, Andreazza, A, Antilogus, P, Apel, W D, Apsimon, R J, Arnoud, Y, Åsman, B, Augustin, J E, Augustinus, A, Baillon, Paul, Bambade, P, Barão, F, Barate, R, Barbiellini, Guido, Bardin, Dimitri Yuri, Barker, G J, Baroncelli, A, Bärring, O, Barrio, J A, Bartl, Walter, Bates, M J, Battaglia, Marco, Baubillier, M, Becks, K H, Beeston, C J, Begalli, M, Beillière, P, Belokopytov, Yu A, Beltran, P, Benedic, D, Benvenuti, Alberto C, Berggren, M, Bertrand, D, Bianchi, F, Bilenky, S M, Billoir, P, Bjarne, J, Bloch, D, Blyth, S, Bocci, V, Bogolubov, P N, Bolognese, T, Bonesini, M, Bonivento, W, Booth, P S L, Borisov, G, Börner, H, Bosio, C, Bostjancic, B, Bosworth, S, Botner, O, Bouquet, B, Bourdarios, C, Bowcock, T J V, Bozzo, M, Braibant, S, Branchini, P, Brand, K D, Brenner, R A, Briand, H, Bricman, C, Brown, R C A, Brümmer, N, Brunet, J M, Bugge, L, Buran, T, Burmeister, H, Buytaert, J, Caccia, M, Calvi, M, Camacho-Rozas, A J, Campion, R, Camporesi, T, Canale, V, Cao, F, Carena, F, Carroll, L, Caso, Carlo, Castillo-Gimenez, M V, Cattai, A, Cavallo, F R, Cerrito, L, Chabaud, V, Chan, A, Charpentier, P, Chaussard, L, Chauveau, J, Checchia, P, Chelkov, G A, Chevalier, L, Chliapnikov, P V, Chorowicz, V, Chrin, J T M, Collins, P, Contreras, J L, Contri, R, Cortina, E, Cosme, G, Couchot, F, Crawley, H B, Crennell, D J, Crosetti, G, Crozon, M, Cuevas-Maestro, J, Czellar, S, Dahl-Jensen, Erik, D'Almagne, B, Dam, M, Damgaard, G, Daubie, Evelyne, Daum, A, Dauncey, P D, Davenport, Martyn, David, P, Davies, J, Da Silva, W, Defoix, C, Delpierre, P A, Demaria, N, De Angelis, A, De Boeck, H, de Boer, Wim, De Clercq, C, De Fez Laso, M D M, De Groot, N, La Vaissière, C de, De Lotto, B, De Min, A, Dijkstra, H, Di Ciaccio, Lucia, Djama, F, Dolbeau, J, Dönszelmann, M, Doroba, K, Dracos, M, Drees, J, Dris, M, Dufour, Y, Dupont, F, Edsall, D M, Eek, L O, Eerola, Paule Anna Mari, Ehret, R, Ekelöf, T J C, Ekspong, Gösta, Elliot-Peisert, A, Engel, J P, Ershaidat, N, Fassouliotis, D, Feindt, Michael, Fernández-Alonso, M, Ferrer, A, Filippas-Tassos, A, Firestone, A, Föth, H, Fokitis, E, Fontanelli, F, Forbes, K A J, Fousset, J L, Francon, S, Franek, B J, Frenkiel, P, Fries, D E C, Frodesen, A G, Frühwirth, R, Fulda-Quenzer, F, Furnival, K, Fürstenau, H, Fuster, J A, Gamba, D, García, C, García, J, Gaspar, C, Gasparini, U, Gavillet, P, Gazis, E N, Gerber, J P, Giacomelli, P, Gokieli, R, Golob, B, Golovatyuk, V M, Gómez-Cadenas, J J, Gopal, Gian P, Górski, M, Gracco, Valerio, Grant, A, Grard, F, Graziani, E, Grosdidier, G, Gross, E, Grosse-Wiesmann, P, Grossetête, B, Gumenyuk, S A, Guy, J, Haedinger, U, Hahn, F, Hahn, M, Haider, S, Hakansson, A, Hallgren, A, Hamacher, K, Hamel de Monchenault, G, Hao, W, Harris, F J, Hedberg, V, Henkes, T, Hernández, J J, Herquet, P, Herr, H, Hessing, T L, Hietanen, I, Higgins, C O, Higón, E, Hilke, Hans Jürgen, Hodgson, S D, Hofmokl, T, Holmes, R, Holmgren, S O, Holthuizen, D J, Honoré, P F, Hooper, J E, Houlden, M A, Hrubec, Josef, Huet, K, Hulth, P O, Hultqvist, K, Ioannou, P, Iversen, P S, Jackson, J N, Jalocha, P, Jarlskog, G, Jarry, P, Jean-Marie, B, Johansson, E K, Johnson, D, Jonker, M, Jönsson, L B, Juillot, P, Kalkanis, G, Kalmus, George Ernest, Kapusta, F, Karlsson, M, Karvelas, E, Katsanevas, S, Katsoufis, E C, Keränen, R, Kesteman, J, Khomenko, B A, Khovanskii, N N, King, B J, Kjaer, N J, Klein, H, Klovning, A, Kluit, P M, Koch-Mehrin, A, Köhne, J H, Köne, B, Kokkinias, P, Koratzinos, M, Korytov, A V, Kostyukhin, V, Kourkoumelis, C, Kuznetsov, O, Kramer, P H, Królikowski, J, Kronkvist, I J, Krüner-Marquis, U, Krupinski, W, Kulka, K, Kurvinen, K L, Lacasta, C, Lambropoulos, C, Lamsa, J, Lanceri, L, Lapin, V, Laugier, J P, Lauhakangas, R, Leder, Gerhard, Ledroit, F, Leitner, R, Lemoigne, Y, Lemonne, J, Lenzen, Georg, Lepeltier, V, Lesiak, T, Lévy, J M, Lieb, E H, Liko, D, Lindgren, J, Lindner, R, Lipniacka, A, Lippi, I, Lörstad, B, Lokajícek, M, Loken, J G, López-Fernandez, A, López-Aguera, M A, Los, M E, Loukas, D, Lozano-Bahilo, J, Lutz, P, Lyons, L, Maehlum, G, Maillard, J, Maio, A, Maltezos, A, Mandl, F, Marco, J, Margoni, M, Marin, J C, Markou, A, Maron, T, Martí, S, Mathis, L G, Matorras, F, Matteuzzi, C, Matthiae, Giorgio, Mazzucato, M, McCubbin, M L, McKay, R, McNulty, R, Meola, G, Meroni, C, Meyer, W T, Michelotto, M, Mikulec, I, Mirabito, L, Mitaroff, Winfried A, Mitselmakher, G, Mjörnmark, U, Moa, T, Møller, R, Mönig, K, Monge, M R, Morettini, P, Müller, H, Murray, W J, Muryn, B, Myatt, Gerald, Navarria, Francesco Luigi, Negri, P, Nicolaidou, R, Nielsen, B S, Nijjhar, B, Nikolaenko, V, Nilsen, P E S, Niss, P, Nomerotski, A, Obraztsov, V F, Olshevskii, A G, Orava, Risto, Ostankov, A P, Österberg, K, Ouraou, A, Paganoni, M, Pain, R, Palka, H, Papadopoulou, T D, Pape, L, Parodi, F, Passeri, A, Pegoraro, M, Pennanen, J, Peralta, L, Pernegger, H, Pernicka, Manfred, Perrotta, A, Petridou, C, Petrolini, A, Petrovykh, O, Pierre, F, Pimenta, M, Pingot, O, Plaszczynski, S, Podobrin, O, Pol, M E, Polok, G, Poropat, P, Pozdnyakov, V, Privitera, P, Pullia, Antonio, Radojicic, D, Ragazzi, S, Rahmani, H, Ratoff, P N, Read, A L, Rebecchi, P, Redaelli, N G, Regler, Meinhard, Reid, D, Renton, P B, Resvanis, L K, Richard, F, Richardson, M, Rídky, J, Rinaudo, G, Roditi, I, Romero, A, Roncagliolo, I, Ronchese, P, Rönnqvist, C, Rosenberg, E I, Rossi, S, Rosso, E, Roudeau, Patrick, Rovelli, T, Rückstuhl, W, Ruhlmann-Kleider, V, Ruiz, A, Rybicki, K, Saarikko, H, Sacquin, Yu, Sajot, G, Salt, J, Sánchez, J, Sannino, M, Schael, S, Schneider, H, Schulze, B, Schyns, M A E, Sciolla, G, Scuri, F, Segar, A M, Seitz, A, Sekulin, R L, Sessa, M I, Sette, G, Seufert, R, Shellard, R C, Siccama, I, Siegrist, P, Simonetti, S, Simonetto, F, Sissakian, A N, Skjevling, G, Smadja, G, Smirnov, N, Smirnova, O G, Smith, G R, Sosnowski, R, Souza-Santos, D, Spassoff, Tz, Spiriti, E, Squarcia, S, Stäck, H, Stanescu, C, Stapnes, Steinar, Stavropoulos, G D, Stichelbaut, F, Stocchi, A, Strauss, J, Straver, J, Strub, R, Stugu, B, Szczekowski, M, Szeptycka, M, Szymanski, P, Tabarelli de Fatis, T, Chikilev, O G, Theodosiou, G E, Tilquin, A, Timmermans, J, Timofeev, V G, Tkatchev, L G, Todorov, T, Toet, D Z, Toker, O, Tomé, B, Torassa, E, Tortora, L, Treille, D, Trevisan, U, Trischuk, W, Tristram, G, Troncon, C, Tsirou, A L, Tsyganov, E N, Turala, Michal, Turluer, M L, Tuuva, T, Tyapkin, I A, Tyndel, M, Tzamarias, S, Überschär, S, Ullaland, O, Uvarov, V, Valenti, G, Vallazza, E, Valls Ferrer, J A, Van der Velde, C, van Apeldoorn, G W, van Dam, P, Van der Heijden, M, Van Doninck, W K, Vaz, P, Vegni, G, Ventura, L, Venus, W A, Verbeure, F, Verlato, M, Vertogradov, L S, Vilanova, D, Vincent, P, Vitale, L, Vlasov, E, Vodopyanov, A S, Vollmer, M, Voutilainen, M, Vrba, V, Wahlen, H, Walck, C, Waldner, F, Wayne, M, Wehr, A, Weierstall, M, Weilhammer, Peter, Werner, J, Wetherell, Alan M, Wickens, J H, Wilkinson, G R, Williams, W S C, Winter, M, Witek, M, Wormser, G, Woschnagg, K, Yamdagni, N, Yepes, P, Zaitsev, A, Zalewska-Bak, A, Zalewski, Piotr, Zavrtanik, D, Zevgolatakos, E, Zhang, G, Zimin, N I, Zito, M, Zuberi, R, Zukanovich-Funchal, R, Zumerle, G, Zúñiga, J, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), DELPHI, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Delphi, Collaboration, Abreu, P., Adam, W., and Canale, Vincenzo
Subjects: Quark, CHARMED MESONS, Nuclear and High Energy Physics, Particle physics, HEAVY FLAVOR PRODUCTION, Electron–positron annihilation, High Energy Physics::Lattice, FRAGMENTATION FUNCTIONS, Flavour, Hadron, 01 natural sciences, Bottom quark, Nuclear physics, MONTE-CARLO, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Nuclear Experiment, Z DECAYS, Physics, Coupling constant, Quantum chromodynamics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, JET PRODUCTION-RATES, QCD, STRING MODEL, High Energy Physics::Experiment, Física nuclear, E+ E ANNIHILATION, Z0 RESONANCE, Particle Physics - Experiment, Lepton
Abstract: The strong coupling constant for b quarks has been determined, and its flavour independence, as predicted by QCD, investigated. The analysis involved events with lepton candidates selected from approximately 356 000 hadronic decays of the Z0, collected by the DELPHI detector at LEP in 1990 and 199 1. A method based on a direct comparison of the three-jet fraction in a b enriched sample, selected by requiring leptons with large momenta and transverse momenta, to that of the entire hadronic sample, illustrated the significant effect of the b quark mass on the multi-jet cross section, and verified the flavour independence of the strong coupling constant to an accuracy of +/- 6%. A second procedure based on a fit to the momentum and transverse momentum spectra of the lepton candidates in both two-jet and three (or more)-jet event samples simultaneously determined the b content in each, and, using second order QCD calculations, gave an absolute measurement of alpha(s) for b quarks of 0. 1 18 +/- 0.004 (stat.) +/- 0.003 (syst.) +/- 0.008 (scale). A comparison with a, for all quark flavours, as measured from the three-jet fraction in all hadronic events, further allowed the coupling strength for b quarks to be expressed in terms relative to that for udsc quarks, thereby cancelling certain common systematic uncertainties, and yielded alpha(s)b/alpha(s)udsc = 1.00 +/- 0.04 (stat.) +/- 0.03 (syst.).
Published: 1993

218. SEARCH FOR Z(0) DECAYS TO 2 LEPTONS AND A CHARGED-PARTICLE ANTIPARTICLE PAIR

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSAN, R and ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ and AMALDI, U ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R and BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A and BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D and BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F and BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M and BONIVENTO, W BOOTH, PSL BORISOV, G BORNER, H BOSIO, C and BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUDINOV, E and BOUQUET, B BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H and BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L and BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F and CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A and CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A and CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CHRIN, JTM COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D and CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E and DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J and DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N and DEANGELIS, A DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD and DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A and DIJKSTRA, H DICIACCIO, L DOLBEAU, J DONSZELMANN, M and DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y and DUPONT, F EDSALL, D EEK, LO EEROLA, PAM EHRET, R and EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N and FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A and FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R and FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J and GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U and GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM GOMEZ, JJ CADENAS, Y and GOPAL, G GORN, L GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P and GROSSETETE, B GUMENYUK, S GUY, J HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAKANSSON, A HALLGREN, A and HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H and HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ and HODGSON, SD HOFMOKL, T HOLMGREN, SO HOLTHUIZEN, D and HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HUET, K and HULTH, PO HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B and JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P and KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M and KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R and KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ and KLEIN, H KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORYTOV, AV and KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH and KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U and KRUPINSKI, W KULKA, K KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R and LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T and LEVY, JM LIEB, E LIKO, D LINDGREN, J LINDNER, R and LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG and LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D and LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J and MAIO, A MALTEZOS, A MANDL, F MARCO, J MARGONI, M and MARIN, JC MARKOU, A MARON, T MARTI, S MATORRAS, F and MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT and MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA and MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ and MURYN, B MYATT, G NAVARRIA, FL NEGRI, P NICOLAIDOU, R and NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES and NISS, P NOMEROTSKI, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M and PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F and PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L and PEREVOZCHIKOV, V PERNEGGER, H PERNICKA, M PERROTTA, A and PETRIDOU, C PETROLINI, A PETROVICH, L PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S PODOBRIN, O POL, ME and POLOK, G POROPAT, P POZDNIAKOV, V PRIVITERA, P PULLIA, A and RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REBECCHI, P REDAELLI, NG REGLER, M REID, D and RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, S ROSSO, E and ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V and RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G and SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H and SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A and SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC and SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F and SISAKIAN, AN SKJEVLING, G SMADJA, G SMIRNOVA, O SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOFF, TS SPIRITI, E and SQUARCIA, S STAECK, H STANESCU, C STAPNES, S and STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J and STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M and SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE and TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG and TODOROV, T TOET, DZ TOKER, O TOME, B TORASSA, E and TORTORA, L TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M and TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S and UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G and VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW and VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M and VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V and WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M and WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH and WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A and ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E and ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ and ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment, Computer Science::Information Theory
Abstract: Based on a sample equivalent to 365000 hadronic Z0 decays, the search in DELPHI data for pairs of leptons accompanied by a pair of charged particles is described. A total of 11 events were found in the electron channel, 9 in the muon channel and 7 in the tau channel. Results on lepton pairs with a radiated photon are also presented. The data from all channels are compatible with the expectations from standard processes. However, one event was found in the tau channel with an unusually high mass of the charged particle pair.
Published: 1993

219. A study of B$^{0}$-$\overline{B}^{0}$ mixing using semileptonic decays of B hadrons produced from Z0

Author: Abreu, P, Adam, W, Adye, T, Agasi, E, Alekseev, G D, Algeri, A, Allen, P, Almehed, S, Alvsvaag, S J, Amaldi, Ugo, Anassontzis, E G, Andreazza, A, Antilogus, P, Apel, W D, Apsimon, R J, Arnoud, Y, Åsman, B, Augustin, J E, Augustinus, A, Baillon, Paul, Bambade, P, Barão, F, Barate, R, Barbiellini, Guido, Bardin, Dimitri Yuri, Barker, G, Baroncelli, A, Bärring, O, Barrio, J A, Bartl, Walter, Bates, M J, Battaglia, Marco, Baubillier, M, Becks, K H, Beeston, C J, Begalli, M, Beillière, P, Belokopytov, Yu A, Beltran, P, Benedic, D, Benvenuti, Alberto C, Berggren, M, Bertrand, D, Bianchi, F, Bilenky, S M, Billoir, P, Bjarne, J, Bloch, D, Blyth, S, Bocci, V, Bogolubov, P N, Bolognese, T, Bonesini, M, Bonivento, W, Booth, P S L, Borisov, G, Börner, H, Bosio, C, Bostjancic, B, Bosworth, S, Botner, O, Boudinov, E, Bouquet, B, Bourdarios, C, Bowcock, T J V, Bozzo, M, Braibant, S, Branchini, P, Brand, K D, Brenner, R A, Briand, H, Bricman, C, Brown, R C A, Brümmer, N, Brunet, J M, Bugge, L, Buran, T, Burmeister, H, Buytaert, J, Caccia, M, Calvi, M, Camacho-Rozas, A J, Campion, R, Camporesi, T, Canale, V, Cao, F, Carena, F, Carroll, L, Caso, Carlo, Castillo-Gimenez, M V, Cattai, A, Cavallo, F R, Cerrito, L, Chabaud, V, Chan, A, Charpentier, P, Chaussard, L, Chauveau, J, Checchia, P, Chelkov, G A, Chevalier, L, Chliapnikov, P V, Chorowicz, V, Chrin, J T M, Clara, M P, Collins, P, Contreras, J L, Contri, R, Cortina, E, Cosme, G, Couchot, F, Crawley, H B, Crennell, D J, Crosetti, G, Crozon, M, Cuevas-Maestro, J, Czellar, S, Dahl-Jensen, Erik, D'Almagne, B, Dam, M, Damgaard, G, Darbo, G, Daubie, Evelyne, Daum, A, Dauncey, P D, Davenport, Martyn, David, P, Davies, J, Da Silva, W, Defoix, C, Delikaris, D, Delorme, S, Delpierre, P A, Demaria, N, De Angelis, A, De Boeck, H, de Boer, Wim, De Clercq, C, De Fez Laso, M D M, De Groot, N, La Vaissière, C de, De Lotto, B, De Min, A, Dijkstra, H, Di Ciaccio, Lucia, Djama, F, Dolbeau, J, Dönszelmann, M, Doroba, K, Dracos, M, Drees, J, Dris, M, Dufour, Y, Dupont, F, Eek, L O, Eerola, Paule Anna Mari, Ehret, R, Ekelöf, T J C, Ekspong, Gösta, Elliot-Peisert, A, Engel, J P, Ershaidat, N, Fassouliotis, D, Feindt, Michael, Fernández-Alonso, M, Ferrer, A, Filippas-Tassos, A, Firestone, A, Föth, H, Fokitis, E, Fontanelli, F, Forbes, K A J, Fousset, J L, Francon, S, Franek, B J, Frenkiel, P, Fries, D E C, Frodesen, A G, Frühwirth, R, Fulda-Quenzer, F, Furnival, K, Fürstenau, H, Fuster, J A, Gamba, D, García, C, García, J, Gaspar, C, Gasparini, U, Gavillet, P, Gazis, E N, Gerber, J P, Giacomelli, P, Gokieli, R, Golob, B, Golovatyuk, V M, Gómez-Cadenas, J J, Goobar, A, Gopal, Gian P, Górski, M, Gracco, Valerio, Grant, A, Grard, F, Graziani, E, Grosdidier, G, Gross, E, Grossetête, B, Grosse-Wiesmann, P, Gumenyuk, S A, Guy, J, Haedinger, U, Hahn, F, Hahn, M, Haider, S, Hakansson, A, Hallgren, A, Hamacher, K, Hamel de Monchenault, G, Hao, W, Harris, F J, Henkes, T, Hernández, J J, Herquet, P, Herr, H, Hessing, T L, Hietanen, I, Higgins, C O, Higón, E, Hilke, Hans Jürgen, Hodgson, S D, Hofmokl, T, Holmes, R, Holmgren, S O, Holthuizen, D J, Honoré, P F, Hooper, J E, Houlden, M A, Hrubec, Josef, Huet, K, Hulth, P O, Hultqvist, K, Ioannou, P, Isenhower, D, Iversen, P S, Jackson, J N, Jalocha, P, Jarlskog, G, Jarry, P, Jean-Marie, B, Johansson, E K, Johnson, D, Jonker, M, Jönsson, L B, Juillot, P, Kalkanis, G, Kalmus, George Ernest, Kapusta, F, Karlsson, M, Karvelas, E, Katsanevas, S, Katsoufis, E C, Keränen, R, Kesteman, J, Khomenko, B A, Khovanskii, N N, King, B J, Kjaer, N J, Klein, H, Klempt, W, Klovning, A, Kluit, P M, Koch-Mehrin, A, Köhne, J H, Köne, B, Kokkinias, P, Kopf, M, Korytov, A V, Kostyukhin, V, Kourkoumelis, C, Kuznetsov, O, Kramer, P H, Królikowski, J, Kronkvist, I J, Krüner-Marquis, U, Krupinski, W, Kulka, K, Kurvinen, K L, Lacasta, C, Lambropoulos, C, Lamsa, J, Lanceri, L, Lapin, V, Laugier, J P, Lauhakangas, R, Leder, Gerhard, Ledroit, F, Leitner, R, Lemoigne, Y, Lemonne, J, Lenzen, Georg, Lepeltier, V, Lesiak, T, Lévy, J M, Lieb, E H, Liko, D, Lindgren, J, Lindner, R, Lipniacka, A, Lippi, I, Lörstad, B, Lokajícek, M, Loken, J G, López-Fernandez, A, López-Aguera, M A, Los, M E, Loukas, D, Lozano-Bahilo, J, Lutz, P, Lyons, L, Maehlum, G, Maillard, J, Maltezos, A, Mandl, F, Marco, J, Margoni, M, Marin, J C, Markou, A, Maron, T, Martí, S, Mathis, L G, Matorras, F, Matteuzzi, C, Matthiae, Giorgio, Mazzucato, M, McCubbin, M L, McKay, R, McNulty, R, Meola, G, Meroni, C, Meyer, W T, Michelotto, M, Mikulec, I, Mirabito, L, Mitaroff, Winfried A, Mitselmakher, G, Mjörnmark, U, Moa, T, Møller, R, Mönig, K, Monge, M R, Morettini, P, Müller, H, Murray, W J, Muryn, B, Myatt, Gerald, Navarria, Francesco Luigi, Negri, P, Nielsen, B S, Nijjhar, B, Nikolaenko, V, Nilsen, P E S, Niss, P, Obraztsov, V F, Olshevskii, A G, Orava, Risto, Ostankov, A P, Österberg, K, Ouraou, A, Paganoni, M, Pain, R, Palka, H, Papadopoulou, T D, Pape, L, Passeri, A, Pegoraro, M, Pennanen, J, Perevozchikov, V, Pernegger, H, Pernicka, Manfred, Perrotta, A, Petridou, C, Petrolini, A, Petrovykh, L P, Pettersen, Tor Erik, Pierre, F, Pimenta, M, Pingot, O, Plaszczynski, S, Pol, M E, Polok, G, Poropat, P, Privitera, P, Pullia, Antonio, Radojicic, D, Ragazzi, S, Rahmani, H, Ratoff, P N, Read, A L, Redaelli, N G, Regler, Meinhard, Reid, D, Renton, P B, Resvanis, L K, Richard, F, Richardson, M, Rídky, J, Rinaudo, G, Roditi, I, Romero, A, Roncagliolo, I, Ronchese, P, Rönnqvist, C, Rosenberg, E I, Rossi, S, Rossi, U, Rosso, E, Roudeau, Patrick, Rovelli, T, Rückstuhl, W, Ruhlmann-Kleider, V, Ruiz, A, Rybicki, K, Saarikko, H, Sacquin, Yu, Sajot, G, Salt, J, Sánchez, J, Sannino, M, Schael, S, Schneider, H, Schulze, B, Schyns, M A E, Sciolla, G, Scuri, F, Segar, A M, Sekulin, R L, Sessa, M I, Sette, G, Seufert, R, Shellard, R C, Siccama, I, Siegrist, P, Simonetti, S, Simonetto, F, Sissakian, A N, Skjevling, G, Smadja, G, Smith, G R, Sosnowski, R, Souza-Santos, D, Spassoff, Tz, Spiriti, E, Squarcia, S, Stäck, H, Stanescu, C, Stapnes, Steinar, Stavropoulos, G D, Stichelbaut, F, Stocchi, A, Strauss, J, Straver, J, Strub, R, Stugu, B, Szczekowski, M, Szeptycka, M, Szymanski, P, Tabarelli de Fatis, T, Chikilev, O G, Theodosiou, G E, Tilquin, A, Timmermans, J, Timofeev, V G, Tkatchev, L G, Todorov, T, Toet, D Z, Toker, O, Torassa, E, Tortora, L, Treille, D, Trevisan, U, Trischuk, W, Tristram, G, Troncon, C, Tsirou, A L, Tsyganov, E N, Turala, Michal, Turluer, M L, Tuuva, T, Tyapkin, I A, Tyndel, M, Tzamarias, S, Überschär, S, Ullaland, O, Uvarov, V, Valenti, G, Vallazza, E, Valls Ferrer, J A, Van der Velde, C, van Apeldoorn, G W, van Dam, P, Van der Heijden, M, Van Doninck, W K, Vaz, P, Vegni, G, Ventura, L, Venus, W A, Verbeure, F, Vertogradov, L S, Vilanova, D, Vincent, P, Vitale, L, Vlasov, E, Vodopyanov, A S, Vollmer, M, Voulgaris, G, Voutilainen, M, Vrba, V, Wahlen, H, Walck, C, Waldner, F, Wayne, M, Wehr, A, Weierstall, M, Weilhammer, Peter, Werner, J, Wetherell, Alan M, Wickens, J H, Wilkinson, G R, Williams, W S C, Winter, M, Witek, M, Wormser, G, Woschnagg, K, Yamdagni, N, Yepes, P, Zaitsev, A, Zalewska-Bak, A, Zalewski, Piotr, Zavrtanik, D, Zevgolatakos, E, Zhang, G, Zimin, N I, Zito, M, Zuberi, R, Zukanovich-Funchal, R, Zumerle, G, and Zúñiga, J
Subjects: Particle Physics - Experiment
Published: 1992

220. Determination of $\alpha_{s}$ in second order QCD in hadronic Z decays

Author: Abreu, P, Adam, W, Adami, F, Adye, T, Åkesson, T, Alekseev, G D, Allen, P, Almehed, S, Alvsvaag, S J, Amaldi, Ugo, Anassontzis, E G, Antilogus, P, Apel, W D, Apsimon, R J, Åsman, B, Astier, Pierre, Augustin, J E, Augustinus, A, Baillon, Paul, Bambade, P, Barão, F, Barate, R, Barbiellini, Guido, Bardin, Dimitri Yuri, Baroncelli, A, Bärring, O, Bartl, Walter, Bates, M J, Battaglia, Marco, Baubillier, M, Becks, K H, Beeston, C J, Begalli, M, Beillière, P, Belokopytov, Yu A, Beltran, P, Benedic, D, Benlloch, J M, Berggren, M, Bertrand, D, Bianchi, F, Bilenky, S M, Billoir, P, Bjarne, J, Bloch, D, Blyth, S, Bocci, V, Bogolubov, P N, Bolognese, T, Bonapart, M, Bonesini, M, Bonivento, W, Booth, P S L, Boratav, M, Borgeaud, P, Borisov, G, Börner, H, Bosio, C, Bostjancic, B, Botner, O, Bouquet, B, Bourdarios, C, Bozzo, M, Braibant, S, Branchini, P, Brand, K D, Brenner, R A, Bricman, C, Brown, R C A, Brümmer, N, Brunet, J M, Bugge, L, Buran, T, Burmeister, H, Buytaert, J, Caccia, M, Calvi, M, Camacho-Rozas, A J, Campion, A, Camporesi, T, Canale, V, Cao, F, Carena, F, Carroll, L, Caso, Carlo, Castelli, Edoardo, Castillo-Gimenez, M V, Cattai, A, Cavallo, F R, Cerrito, L, Chan, A, Chapkin, M M, Charpentier, P, Chaussard, L, Checchia, P, Chelkov, G A, Chevalier, L, Chliapnikov, P V, Chorowicz, V, Cirio, R, Clara, M P, Collins, P, Contreras, J L, Contri, R, Cosme, G, Couchot, F, Crawley, H B, Crennell, D J, Crosetti, G, Crozon, M, Cuevas-Maestro, J, Czellar, S, Dagoret, S, Dahl-Jensen, Erik, D'Almagne, B, Dam, M, Damgaard, G, Darbo, G, Daubie, Evelyne, Dauncey, P D, Davenport, Martyn, David, P, Defoix, C, Delikaris, D, Delorme, S, Delpierre, P A, Demaria, N, De Angelis, A, De Beer, M, De Boeck, H, de Boer, Wim, De Clercq, C, De Fez Laso, M D M, De Groot, N, La Vaissière, C de, De Lotto, B, De Min, A, Dijkstra, H, Di Ciaccio, Lucia, Djama, F, Dolbeau, J, Doll, O, Dönszelmann, M, Doroba, K, Dracos, M, Drees, J, Dris, M, Dufour, Y, Dulinski, W, Eek, L O, Eerola, Paule Anna Mari, Ekelöf, T J C, Ekspong, Gösta, Elliot-Peisert, A, Engel, J P, Fassouliotis, D, Feindt, Michael, Fenyuk, A, Fernández-Alonso, M, Ferrer, A, Filippas-Tassos, A, Firestone, A, Föth, H, Fokitis, E, Folegati, P, Fontanelli, F, Forbes, K A J, Forsbach, H, Franek, B J, Frenkiel, P, Fries, D E C, Frodesen, A G, Frühwirth, R, Fulda-Quenzer, F, Furnival, K, Fürstenau, H, Fuster, J A, Galeazzi, G, Gamba, D, García, C, García, J, Gaspar, C, Gasparini, U, Gavillet, P, Gazis, E N, Gerber, J P, Giacomelli, P, Glitza, K W, Gokieli, R, Golovatyuk, V M, Gómez-Cadenas, J J, Goobar, A, Gopal, Gian P, Górski, M, Gracco, Valerio, Grant, A, Grard, F, Graziani, E, Grosdidier, G, Gross, E, Grossetête, B, Grosse-Wiesmann, P, Guy, J, Hahn, F, Hahn, M, Haider, S, Hajduk, Z, Hakansson, A, Hallgren, A, Hamacher, K, Hamel de Monchenault, G, Harris, F J, Heck, B W, Henkes, T, Herbst, I, Hernández, J J, Herquet, P, Herr, H, Hietanen, I, Higgins, C O, Higón, E, Hilke, Hans Jürgen, Hodgson, S D, Hofmokl, T, Holmes, R, Holmgren, S O, Holthuizen, D J, Honoré, P F, Hooper, J E, Houlden, M A, Hrubec, Josef, Hulth, P O, Hultqvist, K, Husson, D, Ioannou, P, Isenhower, D, Iversen, P S, Jackson, J N, Jalocha, P, Jarlskog, G, Jarry, P, Jean-Marie, B, Johansson, E K, Johnson, D, Jonker, M, Jönsson, L B, Juillot, P, Kalkanis, G, Kalmus, George Ernest, Kapusta, F, Katsanevas, S, Katsoufis, E C, Keränen, R, Kesteman, J, Khomenko, B A, Khovanskii, N N, King, B J, Kjaer, N J, Klein, H, Klempt, W, Klovning, A, Kluit, P M, Koch-Mehrin, A, Köhne, J H, Köne, B, Kokkinias, P, Kopf, M, Koratzinos, M, Korcyl, K, Korytov, A V, Kostukhin, V, Kourkoumelis, C, Kreuzberger, T, Królikowski, J, Kronkvist, I J, Krstic, J, Krüner-Marquis, U, Krupinski, W, Kucewicz, W, Kurvinen, K L, Lacasta, C, Lambropoulos, C, Lamsa, J, Lanceri, L, Lapin, V, Laugier, J P, Lauhakangas, R, Leder, Gerhard, Ledroit, F, Leitner, R, Lemoigne, Y, Lemonne, J, Lenzen, Georg, Lepeltier, V, Letessier-Selvon, A A, Liko, D, Lillethun, E, Lindgren, J, Lipniacka, A, Lippi, I, Llosa, R, Lörstad, B, Lokajícek, M, Loken, J G, López-Aguera, M A, López-Fernandez, A, Los, M E, Loukas, D, Lounis, A, Lozano-Bahilo, J, Lutz, P, Lyons, L, Maehlum, G, Magnussen, N, Maillard, J, Maltezos, A, Mandl, F, Marco, J, Margoni, M, Marin, J C, Markou, A, Martí, S, Mathis, L G, Matorras, F, Matteuzzi, C, Matthiae, Giorgio, Mazzucato, M, McCubbin, M L, McKay, R, McNulty, R, Meola, G, Meroni, C, Meyer, W T, Michelotto, M, Mitaroff, Winfried A, Mitselmakher, G, Mjörnmark, U, Moa, T, Møller, R, Mönig, K, Monge, M R, Morettini, P, Müller, H, Murray, W J, Muryn, B, Myatt, Gerald, Naraghi, F, Nau-Korzen, U, Navarria, Francesco Luigi, Negri, P, Nielsen, B S, Nijjhar, B, Nikolaenko, V, Obraztsov, V F, Österberg, K, Olshevskii, A G, Orava, Risto, Ostankov, A P, Ouraou, A, Paganoni, M, Pain, R, Palka, H, Papadopoulou, T D, Pape, L, Passeri, A, Pegoraro, M, Pennanen, J, Perevozchikov, V, Pernicka, Manfred, Perrotta, A, Pierre, F, Pimenta, M, Pingot, O, Pol, M E, Polok, G, Poropat, P, Privitera, P, Pullia, Antonio, Radojicic, D, Ragazzi, S, Ratoff, P N, Read, A L, Redaelli, N G, Regler, Meinhard, Reid, D, Renton, P B, Resvanis, L K, Richard, F, Richardson, M, Rídky, J, Rinaudo, G, Roditi, I, Romero, A, Roncagliolo, I, Ronchese, P, Rönnqvist, C, Rosenberg, E I, Rossi, U, Rosso, E, Roudeau, Patrick, Rovelli, T, Rückstuhl, W, Ruhlmann, V, Ruiz, A, Rybicki, K, Saarikko, H, Sacquin, Yu, Sajot, G, Salt, J, Sánchez, E, Sánchez, J, Sannino, M, Schäffer, M, Schael, S, Schneider, H, Schyns, M A E, Scuri, F, Segar, A M, Sekulin, R L, Sessa, M I, Sette, G, Seufert, R, Shellard, R C, Siegrist, P, Simonetti, S, Simonetto, F, Sissakian, A N, Skaali, T B, Skjevling, G, Smadja, G, Smith, G R, Sosnowski, R, Spiriti, E, Squarcia, S, Stäck, H, Stanescu, C, Stavropoulos, G D, Stichelbaut, F, Stocchi, A, Strauss, J, Strub, R, Szczekowski, M, Szeptycka, M, Szymanski, P, Tabarelli de Fatis, T, Tavernier, Stefaan, Chikilev, O G, Theodosiou, G E, Tilquin, A, Timmermans, J, Timofeev, V G, Tkatchev, L G, Todorov, T, Toet, D Z, Toker, O, Tomaradze, A G, Torassa, E, Tortora, L, Trainor, M T, Treille, D, Trevisan, U, Trischuk, W, Tristram, G, Troncon, C, Tsirou, A L, Tsyganov, E N, Turala, Michal, Turchetta, R, Turluer, M L, Tuuva, T, Tyapkin, I A, Tyndel, M, Tzamarias, S, Überschär, B, Überschär, S, Ullaland, O, Uvarov, V, Valenti, G, Vallazza, E, Valls Ferrer, J A, van Apeldoorn, G W, van Dam, P, Van Doninck, W K, Van der Velde, C, Varela, J, Vaz, P, Vegni, G, Ventura, L, Venus, W A, Verbeure, F, Vertogradov, L S, Vibert, L, Vilanova, D, Vishnevski, N K, Vitale, L, Vlasov, E V, Vlassopoulos, S, Vodopyanov, A S, Vollmer, M, Volponi, S, Voulgaris, G, Voutilainen, M, Vrba, V, Wahlen, H, Walck, C, Waldner, F, Wayne, M, Weilhammer, Peter, Werner, J, Wetherell, Alan M, Wickens, J H, Wikne, J, Wilkinson, G R, Williams, W S C, Winter, M, Wormald, D, Wormser, G, Woschnagg, K, Yamdagni, N, Yepes, P, Zaitsev, A, Zalewska-Bak, A, Zalewski, Piotr, Zavrtanik, D, Zevgolatakos, E, Zhang, G, Zimin, N I, Zito, M, Zitoun, R, Zukanovich-Funchal, R, Zumerle, G, and Zúñiga, J
Subjects: Particle Physics - Experiment
Published: 1992

221. MEASURING OF THE Z(0)BRANCHING FRACTION TO B QUARK PARIS USING THE BOOSTED SPHERICITY PRODUCT

Author: ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T and ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, EG ANTILOGUS, P APEL, WD APSIMON, RJ and ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY and BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D and BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V and BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W and BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C and BOSTJANCIC, B BOTNER, O BOUQUET, B BOURDARIOS, C and BOWCOCK, TJV BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD and BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H and BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C and CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHAPKIN, M CHARPENTIER, P CHAUSSARD, L and CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L and CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G COUCHOT, F and CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B and DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD and DAVENPORT, M DAVID, P DASILVA, W DEFOIX, C DELIKARIS, D and DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A and DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD and DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A and DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G and PEISERT, AE ENGEL, JP FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H and FOKITIS, E FOLEGATI, P FONTANELLI, F FORBES, KAJ FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R and FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J and GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C and GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP and GIACOMELLI, P GOKIELI, R GOLOVATYUK, VM CADENAS, JJGY and GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A and GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E and GROSSEWIESMANN, P GROSSETETE, B GUMENYUK, S GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ and HECK, BW HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H and HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ and HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO and HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J and HULTH, PO HULTQVIST, K IOANNOU, P ISENHOWER, D and IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P and JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M and JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F and KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P and KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C and KRAMER, PH KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I and KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W and KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW and LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G and LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIEB, E LIKO, D and LILLETHUN, E LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B LOKAJICEK, M LOKEN, JG and LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A and MARON, T MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C and MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R and MCNULTY, R MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M and MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T and MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H and MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL and NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V and OBRAZTSOV, V OESTERBERG, K OLSHEVSKI, AG ORAVA, R and OSTANKOV, A OURAOU, A PAGANONI, M PAIN, R PALKA, H and PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PIERRE, F and PIMENTA, M PINGOT, O POL, ME POLOK, G POROPAT, P and PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J and RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, U ROSSO, E and ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V RUIZ, A and RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J and SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEL, S and SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R and SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB and SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C and STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J and STRAVER, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M and SZYMANSKI, P TABARELLI, T TAVERNIER, S TCHIKILEV, O and THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG and TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TORASSA, E and TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN and TURALA, M TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M and TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V and VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C and VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F and VERTOGRADOV, LS VILANOVA, D VISHNEVSKY, N VITALE, L and VLASOV, E VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M and VOLPONI, S VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H and WALCK, C WALDNER, F WAYNE, M WEHR, A WEIERSTALL, M and WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH and WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P and ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D and ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R and FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment, Nuclear Experiment
Abstract: From a sample of about 120 000 hadronic Z0 decays, using a technique based on a separation of the different event categories in the boosted sphericity product, the fraction of bbBAR decays has been measured to be 0.219 +/- 0.014 (stat) +/- 0.019 (syst). Using the DELPHI determination of the hadronic Z0 width, this corresponds to a partial width GAMMA(bbBAR) = 378 +/- 42 MeV (in good agreement with the standard model prediction of congruent-to 380 N eV). Combining this measurement with the determinations based on events with high p(t) leptons gives an estimate for the branching ratio of b into leptons at LEP of (11.2 +/- 1.2)%, consistent with previous determinations.
Published: 1992

222. EVIDENCE FOR B(S)(0) MESON PRODUCTION IN Z(0) DECAYS

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSEEV, GD and ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G and BARDIN, DY BARONCELLI, A BARRING, O BARRIO, JA BARTL, W and BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH and BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y and BELOUS, K BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P and BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN and BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL and BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B and BOSWORTH, S BOTNER, O BOUQUET, B BOURDARIOS, C and BOWCOCK, TJV BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD and BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H and BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C and GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V and CHAN, A CHAPKIN, M CHARPENTIER, P CHAUSSARD, L and CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L and CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G and CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E and DALMANGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E and DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DASILVA, W and DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W and DECLERCQ, C DELASO, MDM DEGROOT, N DELAVAISSIERE, C and DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DJAMA, F and DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DZHELYADIN, R EEK, LO EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D FEINDT, M FENYUK, A ALONSO, MF and FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S and FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J and GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C and GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP and GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM and CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V and GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E and GROSSEWIESMANN, P GROSSETETE, B GUMENYUK, S GUY, J and HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAJDUK, Z and HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH and HAO, W HARRIS, FJ HENKES, T HERNANDEZ, JJ HERQUET, P and HERR, H HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E and HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO and HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M and HRUBEC, J HUET, C HULTH, PO HULTQVIST, K IOANNOU, P and ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P and JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G and KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATARGIN, A and KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J and KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H and KLEMPT, W KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORCYL, K KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETOV, O KRAMER, PH KROLIKOWSKI, J KRONKVIST, I KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KULKA, K KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R and LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LEVY, JM and LIEB, E LIKO, D LILLETHUN, E LINDGREN, J LINDNER, R and LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M and LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D and LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J and MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC and MARKOU, A MARON, T MARTI, S MATHIS, L MATORRAS, F and MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M and MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT and MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA and MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ and MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL NEGRI, P and NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P and OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A and OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H and PAPADOPOULOU, TD PAPE, L PASSERI, A PEGORARO, M and PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A and PETRIDOU, C PETROLINI, A PETTERSEN, TE PIERRE, F and PIMENTA, M PINGOT, O POL, ME POLOK, G POROPAT, P and PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D and RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M and RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P RONJIN, V RONNQVIST, C ROSENBERG, EI and ROSSI, S ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T and RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H and SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M and SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R and SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S and SIMONETTO, F SISAKIAN, AN SKAALI, TB SKJEVLING, G and SMADJA, G SMIRNOV, N SMITH, GR SOSNOWSKI, R SPASSOFF, TS and SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C and STAPNES, S STAVROPOULOS, G STICHELBAUT, F STOCCHI, A and STRAUSS, J STRAVER, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S TCHIKILEV, O and THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG and TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOMARADZE, A and TORASSA, E TORTORA, L TRAINOR, MT TREILLE, D and TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A and TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O and UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDONINCK, WK and VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F and VERTOGRADOV, LS VILANOVA, D VINCENT, P VISHNEVSKY, N and VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEHR, A WEIERSTALL, M WEILHAMMER, P and WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G and WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G and ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G and ZUNIGA, J
Subjects: High Energy Physics::Phenomenology, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract: Seven unambiguous events out of a sample of 270 000 Z0 decays, contain in tile same jet a D(s) meson and a muon at large transverse momentum relative to the et axis. These events are direct evidence for B(s)0 meson production in hadronic Z0 decays. The production rate of these events, relative to all hadronic Z0 decays is ( 18 +/- 8) x 10(-5) this number including the relevant branching fractions of the B(s)0 and D(s). The value of the B(s)0 meson lifetime relative to the average B meson lifetime is measured to be 0.8 +/- 0.4.
Published: 1992

223. MULTIPLICITY DEPENDENCE OF MEAN TRANSVERSE-MOMENTUM IN E+E- ANNIHILATIONS AT LEP ENERGIES

Author: ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T and ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ and ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY and BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELOUS, K BELTRAN, P and BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M and BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOTNER, O and BOUQUET, B BOURDARIOS, C BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T and BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC and CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHARPENTIER, P and CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA and CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G and COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M and MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E and DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E and DAUNCEY, PD DAVENPORT, M DAVID, P DASILVA, W DEFOIX, C and DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N and DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C and LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B and DEMIN, A DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DULINSKI, W EEK, LO EEROLA, PAM EKELOF, T and EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D and FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A and FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F and FORBES, KAJ FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG and FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H and FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J and GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOVATYUK, VM CADENAS, JJGY and GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A and GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E and GROSSEWIESMANN, P GROSSETETE, B GUY, J HAHN, F HAHN, M and HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A and HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW and HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I and HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF and HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K and HUSSON, D IOANNOU, P ISENHOWER, D IVERSEN, PS and JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B and JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L and JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M and KATARGIN, A KATSANEVAS, S KATSOUFIS, EC KERANEN, R and KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ and KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOEHNE, JH and KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIUKHIN, V KOURKOUMELIS, C KRAMER, PH and KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J and KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K and LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V and LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F and LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LETESSIERSELVON, A LIEB, E LIKO, D LILLETHUN, E and LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LLOSA, R and LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A and AGUERA, MAL LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ and LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MALTEZOS, A and MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A and MARON, T MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C and MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R and MENICHETTI, E MEOLA, G MERONI, C MEYER, WT and MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U and MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MURRAY, WJ MURYN, B MYATT, G NARAGHI, F and NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B and NIKOLAENKO, V OBRAZTSOV, V OESTERBERG, K OLSHEVSKI, AG and ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M PAIN, R and PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M and PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A and PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G and POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D and RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M and RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P RONJIN, V RONNQVIST, C ROSENBERG, EI and ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W and RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y and SAJOT, G SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M and SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE and SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G and SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S and SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G and SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E and SQUARCIA, S STAECK, H STANESCU, C STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRUB, R and SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T and TAVERNIER, S THEODOSIOU, GE TILQUIN, A TIMMERMANS, J and TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O and TORASSA, E TORTORA, L TRAINOR, MT TREILLE, D and TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A and TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML and TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E and FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P and VANDONINCK, WK VARELA, J VAZ, P VEGNI, G VENTURA, L and VENUS, W VERBEURE, F VERTOGRADOV, LS VILANOVA, D and VISHNEVSKY, N VITALE, L VLASOV, E VLASSOPOULOS, S and VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G and VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F and WAYNE, M WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J and WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR and WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: Nuclear Theory, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: A strong increase of the mean transverse momentum [p(t)] with the number of charged particles n(ch) is observed in e+e- annihilations into hadrons at LEP energies, The effect resembles correlations observed in hadron-hadron interactions. In e+e- annihilations the [p(t)] and n(ch) correlations can be accounted for by gluon radiation.
Published: 1992

224. MULTIPLICITY FLUCTUATIONS IN HADRONIC FINAL-STATES FROM THE DECAY OF THE Z(0)

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSEEV, GD and ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G and BARDIN, DY BARKER, G BARONCELLI, A BARRING, O BARRIO, JA and BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y and BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M and BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J and BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P and BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S and BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV and BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA and BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA and CACCIA, M CALVI, M ROZAS, AJC CAMPORESI, T CANALE, V and CAO, F CARENA, F CARROLL, L CASO, C GIMENEZ, MVC and CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A and CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CHRIN, JTM CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R and CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S and DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G and DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P and DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S and DELPIERRE, P DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N and DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H and DICIACCIO, L DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y EEK, LO and EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G PEISERT, AE and ENGEL, JP FASSOULIOTIS, D FEARNLEY, TA FEINDT, M and ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H and FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL and FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG and FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H and FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J and GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM and CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V and GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E and GROSSEWIESMANN, P GROSSETETE, B GUY, J HAEDINGER, U and HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A and HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H and HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ and HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO and HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J and HUET, C HULTH, PO HULTQVIST, K IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G and JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M and JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN and KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A and KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P and KOPF, M KORCYL, K KORYTOV, AV KOSTIOUKHINE, V and KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J and KRONKVIST, I KRUENERMARQUIS, U KRUPINSKI, W KULKA, K and KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW and LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G and LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LEVY, JM LIEB, E LIKO, D LILLETHUN, E and LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I and LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A and AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P and LYONS, L MAEHLUM, G MAILLARD, J MALTEZOS, A MANDL, F and MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T and MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G and MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I and MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U and MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MURRAY, WJ MURYN, B MYATT, G NARAGHI, F and NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P OBRAZTSOV, V OLSHEVSKI, AG and ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M and PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PASSERI, A and PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PETTERSEN, TE and PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G and POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REDAELLI, NG and REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F and RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A and RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI and ROSSI, S ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T and RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K and SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J and SANNINO, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G and SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G and SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P and SIMONETTI, S SIMONETTO, F SISAKIAN, AN SKAALI, TB and SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C and STAPNES, S STAVROPOULOS, G STICHELBAUT, F STOCCHI, A and STRAUSS, J STRAVER, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S TCHIKILEV, O and THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG and TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TORASSA, E and TORTORA, L TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M and TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S and UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G and VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW and VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS and VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOULGARIS, G VOUTILAINEN, M VRBA, V and WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEHR, A and WEIERSTALL, M WEILHAMMER, P WERNER, J WETHERELL, AM and WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N and YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D and ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R and FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment
Abstract: An analysis of the fluctuations in the phase space distribution of hadrons produced in the decay of 78829 Z0 has been carried out, using the method of factorial moments. The high statistics collected by the DELPHI experiment at LEP during 1990 allowed studies of the event sample both globally and in intervals of p(t) and multiplicity, and for different jet topologies and for single jets. A large contribution to the factorial moments of the one-dimensional data on rapidity with respect to the event axis comes from hard gluons. Details of factorial moments in two and three dimensions are presented. Influences of resonance decays have been studied by Monte Carlo simulation: one-dimensional factorial moments at low p(t), and two-, three-dimensional analyses are affected. Parton shower models describe the data reasonably well.
Published: 1992

225. Search for excited charged leptons in Z0 decays

Author: Abreu, P. Adam, W. Adami, F. Adye, T. Akesson, T. Alekseev, G.D. Allen, P. Almehed, S. Alted, F. Alvsvaag, S.J. Amaldi, U. Anassontzis, E. Antilogus, P. Apel, W.-D. Åsman, B. Astier, P. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barbiellini, G. Bardin, D.Y. Baroncelli, A. Barring, O. Bartl, W. Bates, M.J. Baubillier, M. Becks, K.-H. Beeston, C.J. Begalli, M. Beilliere, P. Belokopytov, Yu. Beltran, P. Benedic, D. Benlloch, J.M. Berggren, M. Bertrand, D. Biagi, S. Bianchi, F. Bibby, J.H. Bilenky, M.S. Billoir, P. Bjarne, J. Bloch, D. Blyth, S. Bogolubov, P.N. Bolognese, T. Bonapart, M. Bonesini, M. Bonivento, W. Booth, P.S.L. Boratav, M. Borgeaud, P. Borisov, G. Borner, H. Bosio, C. Botner, O. Bouquet, B. Bozzo, M. Braibant, S. Branchini, P. Brand, K.D. Brenner, R.A. Bricman, C. Brown, R.C.A. Brummer, N. Brunet, J.-M. Bugge, L. Buran, T. Burmeister, H. Buytaert, J.A.M.A. Caccia, M. Calvi, M. Camacho Rozas, A.J. Campagne, J.-E. Campion, A. Camporesi, T. Canale, V. Cao, F. Carroll, L. Caso, C. Castelli, E. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Cerrito, L. Charpentier, P. Checchia, P. Chelkov, G.A. Chevalier, L. Chliapnikov, P. Chorowicz, V. Cirio, R. Collins, M.P. Contreras, J.L. Contri, R. Cosme, G. Couchot, F. Crawley, H.B. Crennell, D. Crosetti, G. Crosland, N. Crozon, M. Cuevas Maestro, J. Czellar, S. Dagoret, S. Dahl-Jensen, E. Dalmagne, B. Dam, M. Damgaard, G. Darbo, G. Daubie, E. Dauncey, P.D. Davenport, M. David, P. De Angelis, A. De Beer, M. De Boeck, H. De Boer, W. De Clercq, C. De Fez Laso, M.D.M. De Groot, N. De La Vaissiere, C. De Lotto, B. De Min, A. Defoix, C. Delikaris, D. Delorme, S. Delpierre, P. Demaria, N. Derkaoui, J. Di Ciaccio, L. Dijkstra, H. Djama, F. Dolbeau, J. Donszelmann, M. Doroba, K. Dracos, M. Drees, J. Dris, M. Dufour, Y. Dulinski, W. Dzhelyadin, R. Eek, L.-O. Eerola, P.A.-M. Ekelof, T. Ekspong, G. Elliot Peisert, A. Engel, J.P. Falaleev, V. Fassouliotis, D. Fernandez Alonso, M. Ferrer, A. Filippas, T.A. Firestone, A. Foeth, H. Fokitis, E. Folegati, P. Fontanelli, F. Forsbach, H. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Furnival, K. Furstenau, H. Fuster, J. Gago, J.M. Galeazzi, G. Gamba, D. Garcia, C. Garcia, J. Gasparini, U. Gavillet, P. Gazis, E.N. Gerber, J.-P. Giacomelli, P. Glitza, K.-W. Gokieli, R. Golovatyuk, V.M. Gomez Y Cadenas, J.J. Goobar, A. Gopal, G. Gorski, M. Gracco, V. Grant, A. Grard, F. Graziani, E. Gros, M.-H. Grosdidier, G. Grossetete, B. Gumenyuk, S. Guy, J. Hahn, F. Hahn, M. Haider, S. Hajduk, Z. Hakansson, A. Hallgren, A. Hamacher, K. Hamel De Monchenault, G. Harris, F.J. Heck, B.W. Herbst, I. Hernandez, J.J. Herquet, P. Herr, H. Hietanen, I. Higon, E. Hilke, H.J. Hodgson, S.D. Hofmokl, T. Holmes, R. Holmgren, S.-O. Holthuizen, D. Honore, P.F. Hooper, J.E. Houlden, M. Hrubec, J. Hulth, P.O. Hultqvist, K. Husson, D. Hyams, B.D. Ioannou, P. Isenhower, D. Iversen, P.-S. Jackson, J.N. Jalocha, P. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Johnson, D. Jonker, M. Jonsson, L. Juillot, P. Kalkanis, G. Kalmus, G. Kantardjian, G. Kapusta, F. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kesteman, J. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, N.J. Klein, H. Klempt, W. Klovning, A. Kluit, P. Koehne, J.H. Koene, B. Kokkinias, P. Kopf, M. Koratzinos, M. Korcyl, K. Korytov, A.V. Korzen, B. Kostukhin, V. Kourkoumelis, C. Kreuzberger, T. Krolikowski, J. Kruener-Marquis, U. Krupinski, W. Kucewicz, W. Kurvinen, K. Lacasta, C. Lambropoulos, C. Lamsa, J.W. Lanceri, L. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Lemonne, J. Lenzen, G. Lepeltier, V. Letessier-Selvon, A. Liko, D. Lieb, E. Lillethun, E. Lindgren, J. Lipniacka, A. Lippi, I. Llosa, R. Loerstad, B. Lokajicek, M. Loken, J.G. Lopez Aguera, M.A. Lopez-Fernandez, A. Los, M. Loukas, D. Lounis, A. Lozano, J.J. Lucock, R. Lutz, P. Lyons, L. Maehlum, G. Maillard, J. Maltezos, A. Maltezos, S. Mandl, F. Marco, J. Margoni, M. Marin, J.-C. Markou, A. Marti, S. Mathis, L. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Menichetti, E. Meroni, C. Meyer, W.T. Michelotto, M. Mitaroff, W.A. Mitselmakher, G.V. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Morettini, P. Mueller, H. Muller, H. Murray, W.J. Myatt, G. Naraghi, F. Nau-Korzen, U. Navarria, F.L. Negri, P. Nielsen, B.S. Nijjhar, B. Nikolaenko, V. Obraztsov, V. Olshevski, A.G. Orava, R. Ostankov, A. Ouraou, A. Pain, R. Palka, H. Papadopoulou, T. Pape, L. Passeri, A. Pegoraro, M. Perevozchikov, V. Pernicka, M. Perrotta, A. Pierre, F. Pimenta, M. Pingot, O. Pinsent, A. Pol, M.E. Polok, G. Poropat, P. Privitera, P. Pullia, A. Pyythia, J. Radojicic, D. Ragazzi, S. Range, W.H. Ratoff, P.N. Read, A.L. Redaelli, N.G. Regler, M. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, M. Ridky, J. Rinaudo, G. Roditi, I. Romero, A. Roncagliolo, I. Ronchese, P. Ronnqvist, C. Rosenberg, E.I. Rossi, U. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann, V. Ruiz, A. Rybicki, K. Saarikko, H. Sacquin, Y. Salt, J. Sanchez, E. Sanchez, J. Sannino, M. Schaeffer, M. Schneider, H. Scuri, F. Segar, A.M. Sekulin, R. Sessa, M. Sette, G. Seufert, R. Shellard, R.C. Siegrist, P. Simonetti, S. Simonetto, F. Sissakian, A.N. Skaali, T.B. Skjevling, G. Smadja, G. Smith, G.R. Smirnov, N. Sosnowski, R. Spassoff, T.S. Spiriti, E. Squarcia, S. Staeck, H. Stanescu, C. Stavropoulos, G. Stichelbaut, F. Stocchi, A. Strauss, J. Strub, R. Stubenrauch, C.J. Szczekowski, M. Szeptycka, M. Szymanski, P. Tabarelli, T. Tavernier, S. Theodosiou, G.E. Tilquin, A. Timmermans, J. Timofeev, V.G. Tkatchev, L.G. Todorov, T. Toet, D.Z. Tortora, L. Trainor, M.T. Treille, D. Trevisan, U. Trischuk, W. Tristram, G. Troncon, C. Tsirou, A. Tsyganov, E.N. Turala, M. Turchetta, R. Turluer, M.-L. Tuuva, T. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Ueberschaer, B. Ueberschaer, S. Ullaland, O. Uvarov, V.A. Valenti, G. Vallazza, E. Valls Ferrer, J.A. Van Apeldoorn, G.W. Van Dam, P. Van Doninck, W.K. Van Eijndhoven, N. Vander Velde, C. Varela, J. Vaz, P. Vegni, G. Velasco, J. Ventura, L. Venus, W. Verbeure, F. Vertogradov, L.S. Vibert, L. Vilanova, D. Vlasov, E.V. Vodopyanov, A.S. Vollmer, M. Volponi, S. Voulgaris, G. Voutilainen, M. Vrba, V. Wahlen, H. Walck, C. Waldner, F. Wayne, M. Weilhammer, P. Werner, J. Wetherell, A.M. Wickens, J.H. Wikne, J. Wilkinson, G.R. Williams, W.S.C. Winter, M. Wormald, D. Wormser, G. Woschnagg, K. Yamdagni, N. Yepes, P. Zaitsev, A. Zalewska, A. Zalewski, P. Zevgolatakos, E. Zhang, G. Zimin, N.I. Zito, M. Zitoun, R. Zukanovich Funchal, R. Zumerle, G. Zuniga, J.
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: Using a data sample of 115000 hadronic Z0 decays, a search was performed for the production of excited charged leptons decaying into an ordinary lepton and one photon. Pair production of excited leptons of mass below 45 GeV/c2 is excluded. From an analysis of the lepton-photon mass spectra this experiment is also able to exclude single production of these particles for masses that reach up to 85 GeV/c2, if the compositeness scale is below 1 TeV. © 1992 Springer-Verlag.
Published: 1992

226. Determination of 55-155-155-1in second order QCD from hadronic Z decays

Author: Abreu, P. Adam, W. Adami, F. Adye, T. Akesson, T. Alekseev, G.D. Allen, P. Almehed, S. Alvsvaag, S.J. Amaldi, U. Anassontzis, E. Antilogus, P. Apel, W.-D. Apsimon, R.J. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barate, R. Barbiellini, G. Bardin, D.Y. Baroncelli, A. Barring, O. Bartl, W. Bates, M.J. Battaglia, M. Baubillier, M. Becks, K.-H. Beeston, C.J. Begalli, M. Beilliere, P. Belokopytov, Yu. Beltran, P. Benedic, D. Benlloch, J.M. Berggren, M. Bertrand, D. Bianchi, F. Bilenky, M.S. Billoir, P. Bjarne, J. Bloch, D. Blyth, S. Bocci, V. Bogolubov, P.N. Bolognese, T. Bonapart, M. Bonesini, M. Bonivento, W. Booth, P.S.L. Borgeaud, P. Borisov, G. Borner, H. Bosio, C. Bostjancic, B. Botner, O. Bouquet, B. Bourdarios, C. Bozzo, M. Braibant, S. Branchini, P. Brand, K.D. Brenner, R.A. Briand, H. Bricman, C. Brown, R.C.A. Brummer, N. Brunet, J.-M. Bugge, L. Buran, T. Burmeister, H. Buytaert, J.A.M.A. Caccia, M. Calvi, M. Camacho Rozas, A.J. Campion, A. Camporesi, T. Canale, V. Cao, F. Carena, F. Carroll, L. Caso, C. Castelli, E. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Cerrito, L. Chan, A. Chapkin, M. Charpentier, P. Chaussard, L. Chauveau, J. Checchia, P. Chelkov, G.A. Chevalier, L. Chliapnikov, P. Chorowicz, V. Cirio, R. Clara, M.P. Collins, P. Contreras, J.L. Contri, R. Cosme, G. Couchot, F. Crawley, H.B. Crennell, D. Crosetti, G. Crozon, M. Cuevas Maestro, J. Czellar, S. Dagoret, S. Dahl-Jensen, E. Dalmagne, B. Dam, M. Damgaard, G. Darbo, G. Daubie, E. Dauncey, P.D. Davenport, M. David, P. Da Silva, W. Defoix, C. Delikaris, D. Delorme, S. Delpierre, P. Demaria, N. De Angelis, A. De Beer, M. De Boeck, H. De Boer, W. De Clercq, C. De Fez Laso, M.D.M. De Groot, N. De La Vaissiere, C. De Lotto, B. De Min, A. Dijkstra, H. Di Ciaccio, L. Djama, F. Dolbeau, J. Doll, O. Donszelmann, M. Doroba, K. Dracos, M. Drees, J. Dris, M. Dufour, Y. Dulinski, W. Eek, L.-O. Eerola, P.A.-M. Ekelof, T. Ekspong, G. Elliot Peisert, A. Engel, J.-P. Fassouliotis, D. Feindt, M. Fenyuk, A. Fernandez Alonso, M. Ferrer, A. Filippas, T.A. Firestone, A. Foeth, H. Fokitis, E. Folegati, P. Fontanelli, F. Forbes, K.A.J. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Furnival, K. Furstenau, H. Fuster, J. Galeazzi, G. Gamba, D. Garcia, C. Garcia, J. Gaspar, C. Gasparini, U. Gavillet, P. Gazis, E.N. Gerber, J.-P. Giacomelli, P. Gokieli, R. Golovatyuk, V.M. Gomez Y Cadenas, J.J. Goobar, A. Gopal, G. Gorski, M. Gracco, V. Grant, A. Grard, F. Graziani, E. Grosdidier, G. Gross, E. Grosse-Wiesmann, P. Grossetete, B. Guy, J. Hahn, F. Hahn, M. Haider, S. Hajduk, Z. Hakansson, A. Hallgren, A. Hamacher, K. Hamel De Monchenault, G. Harris, F.J. Heck, B.W. Henkes, T. Hernandez, J.J. Herquet, P. Herr, H. Hietanen, I. Higgins, C.O. Higon, E. Hilke, H.J. Hodgson, S.D. Hofmokl, T. Holmes, R. Holmgren, S.-O. Holthuizen, D. Honore, P.F. Hooper, J.E. Houlden, M. Hrubec, J. Hulth, P.O. Hultqvist, K. Husson, D. Ioannou, P. Isenhower, D. Iversen, P.-S. Jackson, J.N. Jalocha, P. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Johnson, D. Jonker, M. Jonsson, L. Juillot, P. Kalkanis, G. Kalmus, G. Kapusta, F. Karlsson, M. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kesteman, J. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, N.J. Klein, H. Klempt, W. Klovning, A. Kluit, P. Koch-Mehrin, A. Koehne, J.H. Koene, B. Kokkinias, P. Kopf, M. Koratzinos, M. Korcyl, K. Korytov, A.V. Kostiukhin, V. Kourkoumelis, C. Kramer, P.H. Kreuzberger, T. Krolikowski, J. Kronkvist, I. Krstic, J. Krüner-Marquis, U. Krupinski, W. Kucewicz, W. Kurvinen, K. Lacasta, C. Lambropoulos, C. Lamsa, J.W. Lanceri, L. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Leitner, R. Lemoigne, Y. Lemonne, J. Lenzen, G. Lepeltier, V. Letessier-Selvon, A. Lieb, E. Liko, D. Lillethun, E. Lindgren, J. Lindner, R. Lipniacka, A. Lippi, I. Llosa, R. Loerstad, B. Lokajicek, M. Loken, J.G. Lopez-Fernandez, A. Lopez Aguera, M.A. Los, M. Loukas, D. Lounis, A. Lozano, J.J. Lutz, P. Lyons, L. Maehlum, G. Magnussen, N. Maillard, J. Maltezos, A. Mandl, F. Marco, J. Margoni, M. Marin, J.-C. Markou, A. Maron, T. Marti, S. Mathis, L. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. Meola, G. Meroni, C. Meyer, W.T. Michelotto, M. Mitaroff, W.A. Mitselmakher, G.V. Mjoernmark, U. Moa, T. Moeller, R. Mönig, K. Monge, M.R. Morettini, P. Mueller, H. Murray, W.J. Muryn, B. Myatt, G. Naraghi, F. Navarria, F.L. Negri, P. Nielsen, B.S. Nijjhar, B. Nikolaenko, V. Obraztsov, V. Oesterberg, K. Olshevski, A.G. Orava, R. Ostankov, A. Ouraou, A. Paganoni, M. Pain, R. Palka, H. Papadopoulou, T. Pape, L. Passeri, A. Pegoraro, M. Pennanen, J. Perevozchikov, V. Pernicka, M. Perrotta, A. Pierre, F. Pimenta, M. Pingot, O. Pol, M.E. Polok, G. Poropat, P. Privitera, P. Pullia, A. Radojicic, D. Ragazzi, S. Ratoff, P.N. Read, A.L. Redaelli, N.G. Regler, M. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, M. Ridky, J. Rinaudo, G. Roditi, I. Romero, A. Roncagliolo, I. Ronchese, P. Ronjin, V. Ronnqvist, C. Rosenberg, E.I. Rossi, U. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann, V. Ruiz, A. Rybicki, K. Saarikko, H. Sacquin, Y. Sajot, G. Salt, J. Sanchez, E. Sanchez, J. Sannino, M. Schaeffer, M. Schael, S. Schneider, H. Schyns, M.A.E. Scuri, F. Segar, A.M. Sekulin, R. Sessa, M. Sette, G. Seufert, R. Shellard, R.C. Siegrist, P. Simonetti, S. Simonetto, F. Sissakian, A.N. Skaali, T.B. Skjevling, G. Smadja, G. Smith, G.R. Sosnowski, R. Spassoff, T.S. Spiriti, E. Squarcia, S. Staeck, H. Stanescu, C. Stavropoulos, G. Stichelbaut, F. Stocchi, A. Strauss, J. Strub, R. Szczekowski, M. Szeptycka, M. Szymanski, P. Tabarelli, T. Tavernier, S. Tchikilev, O. Theodosiou, G.E. Tilquin, A. Timmermans, J. Timofeev, V.G. Tkatchev, L.G. Todorov, T. Toet, D.Z. Toker, O. Tomaradze, A. Torassa, E. Tortora, L. Trainor, M.T. Treille, D. Trevisan, U. Trischuk, W. Tristram, G. Troncon, C. Tsirou, A. Tsyganov, E.N. Turala, M. Turchetta, R. Turluer, M.-L. Tuuva, T. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Überschär, B. Überchär, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Valls Ferrer, J.A. Vander Velde, C. Van Apeldoorn, G.W. Van Dam, P. Van Dominck, W.K. Varela, J. Vaz, P. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Vertogradov, L.S. Vilanova, D. Vishnevsky, N. Vitale, L. Vlasov, E. Vlassopoulos, S. Vodopyanov, A.S. Vollmer, M. Volponi, S. Voulgaris, G. Voutilainen, M. Vrba, V. Wahlen, H. Walck, C. Waldner, F. Wayne, M. Wehr, A. Weierstall, M. Weilhammer, P. Werner, J. Wetherell, A.M. Wickens, J.H. Wikne, J. Wilkinson, G.R. Williams, W.S.C. Winter, M. Wormald, D. Wormser, G. Woschnagg, K. Yamdagni, N. Yepes, P. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zhang, G. Zimin, N.I. Zito, M. Zitoun, R. Zukanovich Funchal, P. Zumerle, G. Zuniga, J.
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: Distributions of event shape variables obtained from 120600 hadronic Z decays measured with the DELPHI detector are compared to the predictions of QCD based event generators. Values of the strong coupling constant αs are derived as a function of the renormalization scale from a quantitative analysis of eight hadronic distributions. The final result, αs(MZ), is based on second order perturbation theory and uses two hadronization corrections, one computed with a parton shower model and the other with a QCD matrix element model. © 1992 Springer-Verlag.
Published: 1992

227. STUDY OF ORIENTATION OF 3-JET EVENTS IN Z(0) HADRONIC DECAYS USING THE DELPHI DETECTOR

Author: ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T and ALEKSEEV, GD ALLEN, P ALMEHED, S ALTED, F ALVSVAAG, SJ and AMALDI, U ANASSONTZIS, E ANTILOGUS, P APEL, WD and APSIMON, RJ ASMAN, B ASTIER, P AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARBIELLINI, G and BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATTAGLIA, M BATES, MJ BAUBILLIER, M BECKS, KH BEESTON, CJ and BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELOUS, K and BELTRAN, P BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIAGI, S BIANCHI, F BIBBY, JH BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOGOLUBOV, PN and BOLOGNESE, T BONAPART, M BONESINI, M BONIVENTO, W BOOTH, PSL BORATAV, M BORGEAUD, P BORNER, H BOSIO, C and BOTNER, O BOUQUET, B BOZZO, M BRAIBANT, S BRANCHINI, P and BRAND, KD BRENNER, RA BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H and BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPAGNE, JE CAMPION, A CAMPORESI, T CANALE, V CAO, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A and CAVALLO, FR CERRITO, L CHAPKIN, M CHARPENTIER, P and CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P and CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL and CONTRI, R COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROSLAND, N CROZON, M MAESTRO, JC and CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B DAM, M and DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD and DAVENPORT, M DAVID, P DEANGELIS, A DEBEER, M DEBOECK, H and DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N and DELAVAISSIERE, C DELOTTO, B DEFOIX, C DELIKARIS, D and DELORME, S DELPIERRE, P DEMARIA, N DEMIN, A DERKAOUI, J and DICIACCIO, L DIJKSTRA, H DJAMA, F DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DULINSKI, W DZHELYADIN, R EEK, LO EEROLA, PAM EKELOF, T and EKSPONG, G PEISERT, AE ENGEL, JP FALALEEV, V and FASSOULIOTIS, D ALONSO, MF FERRER, A FILIPPAS, TA and FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F FORSBACH, H FRANEK, B FRANSSON, KE FRENKIEL, P and FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F and FURNIVAL, K FURSTENAU, H FUSTER, J GAGO, JM GALEAZZI, G and GAMBA, D GARCIA, C GARCIA, J GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GLITZA, KW and GOKIELI, R GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E and GROS, MH GROSDIDIER, G GROSSETETE, B GUY, J HAHN, F and HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A and HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW and HERBST, I HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I and HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R and HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE and HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D and HYAMS, BD IOANNOU, P ISENHOWER, D IVERSEN, PS and JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B and JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L and JUILLOT, P KALKANIS, G KALMUS, G KANTARDJIAN, G KAPUSTA, F KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J and KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H and KLEMPT, W KLIUTCHNIKOV, G KLOVNING, A KLUIT, P and KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M and KORCYL, K KORYTOV, AV KORZEN, B KOURKOUMELIS, C and KREUZBERGER, T KROLIKOWSKI, J KRSTIC, J KRUENERMARQUIS, U and KRUPINSKI, W KUCEWICZ, W KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEMONNE, J and LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIKO, D LIEB, E LILLETHUN, E LINDGREN, J LIPNIACKA, A LIPPI, I and LLOSA, R LOERSTAD, B LOKAJICEK, M LOKEN, JG AGUERA, MAL and LOPEZFERNANDEZ, A LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUCOCK, R LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J and MALTEZOS, A MALTEZOS, S MANDL, F MARCO, J MARGONI, M and MARIN, JC MARKOU, A MARTI, S MATHIS, L MATORRAS, F and MATTEUZZI, C MATTHIAE, G MATVEEV, M MAZZUCATO, M and MCCUBBIN, M MCKAY, R MCNULTY, R MENICHETTI, E MERONI, C and MEYER, WT MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV and MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR and MORETTINI, P MUELLER, H MULLER, H MURRAY, WJ MYATT, G NARAGHI, F NAUKORZEN, U NAVARRIA, FL NEGRI, P and NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V and OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAIN, R and PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M and PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A PIERRE, F and PIMENTA, M PINGOT, O PINSENT, A POL, ME POLOK, G and POROPAT, P PRIVITERA, P PULLIA, A PYYHTIA, J RADOJICIC, D RAGAZZI, S RANGE, WH RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK and RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I and ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C and ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T and RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K and SAARIKKO, H SACQUIN, Y SALT, J SANCHEZ, E SANCHEZ, J and SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCURI, F and SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R and SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F and SISSAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F and STOCCHI, A STRAUSS, J STRUB, R STUBENRAUCH, CJ and SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T and TAVERNIER, S THEODOSIOU, GE TILQUIN, A TIMMERMANS, J and TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TORTORA, L and TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W and TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M and TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA and TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S and ULLALAND, O UVAROV, VA VALENTI, G VALLAZZA, E FERRER, JAV VANAPELDOORN, GW VANDAM, P VANDONINCK, WK and VANEIJNDHOVEN, N VANDERVELDE, C VARELA, J VAZ, P VEGNI, G VELASCO, J VENTURA, L VENUS, W VERBEURE, F and VERTOGRADOV, LS VIBERT, L VILANOVA, D VITALE, L VLASOV, EV VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G and VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F and WAYNE, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M and WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P and ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZEVGOLATAKOS, E and ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ and ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: The study of the orientation of three-jet events from e+ e- –> Z0 –> multi-hadrons is presented, in particular the polar angle distributions of the thrust axis and of the normal to the three-jet plane, and the azimuthal correlations between the hadron plane and the one defined by the beam and thrust axes. The data are compared with results at lower energy and with QCD predictions. Good agreement with QCD predictions is observed. The scalar gluon theory is excluded by the data.
Published: 1992

228. SEARCH FOR SCALAR LEPTOQUARKS FROM Z(0) DECAYS

Author: ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T and ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ and ASMAN, B ASTIER, P AUGUSTIN, JE AUGUSTINUS, A BAILLON, P and BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ and BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ and BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P and BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M and BONESINI, M BONIVENTO, W BOOTH, PSL BORATAV, M BORGEAUD, P BORNER, H BOSIO, C BOSTJANCIC, B BOTNER, O and BOUQUET, B BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD and BRENNER, RA BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA and CACCIA, M CALVI, M ROZAS, AJC CAMPION, A CAMPORESI, T and CANALE, V CAO, F CARENA, F CARROLL, L CASO, C and CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHAPKIN, M CHARPENTIER, P CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D and CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S and DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P and DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C and LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B and DEMIN, A DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P and DEMARIA, N DERKAOUI, J DICIACCIO, L DIJKSTRA, H and DJAMA, F DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M and DREES, J DRIS, M DUFOUR, Y DULINSKI, W DZHELYADIN, R and EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE and ENGEL, JP FASSOULIOTIS, D FEINDT, M ALONSO, MF and FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FOLEGATI, P FONTANELLI, F FORBES, KAJ FORSBACH, H and FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J and GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C and GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP and GIACOMELLI, P GLITZA, KW GOKIELI, R GOLOVATYUK, VM and CADENAS, JGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V and GRANT, A GRARD, F GRAZIANI, E GROS, MH GROSDIDIER, G and GROSS, E GROSSETETE, B GROSSEWIESMANN, P GUY, J HAHN, F and HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A and HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW and HENKES, T HERBST, I HERNANDEZ, JJ HERQUET, P HERR, H and HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD and HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D and HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO and HULTQVIST, K HUSSON, D IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P and JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F and KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J and KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H and KLEMPT, W KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B and KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K and KORYTOV, AV KOSTIUKHIN, V KOURKOUMELIS, C KREUZBERGER, T and KROLIKOWSKI, J KRONKVIST, I KRSTIC, J KRUENERMARQUIS, U and KRUPINSKI, W KUCEWICZ, W KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R and LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LETESSIERSELVON, A LIKO, D LIEB, E LILLETHUN, E and LINDGREN, J LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B and LOKAJICEK, M LOKEN, JG AGUERA, MAL LOPEZFERNANDEZ, A and LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUCOCK, R and LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MANDL, F and MARCO, J MARGONI, M MARIN, JC MARKOU, A MARTI, S and MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G and MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MENICHETTI, E MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M and MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T and MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H and MURRAY, WJ MYATT, G NARAGHI, F NAUKORZEN, U and NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A and OURAOU, A PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L and PASSERI, A PEGORARO, M PEREVOZCHIKOV, V PERNICKA, M and PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O POL, ME and POLOK, G POROPAT, P PRIVITERA, P PULLIA, A PYYHTIA, J and RADOJJCIC, D RAGAZZI, S RATOFF, PN READ, AL and REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK and RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C and ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T and RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K and SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E and SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M and SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P and SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB and SKJEVLING, G SMADJA, G SMITH, GR SMIRNOV, N SOSNOWSKI, R and SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H and STANESCU, C STAVROPOULOS, G STICHELBAUT, F STOCCHI, A and STRAUSS, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M and SZYMANSKI, P TABARELLI, T TAVERNIER, S THEODOSIOU, G and TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG and TODOROV, T TOET, DZ TOMARADZE, A TORTORA, L TRAINOR, MT and TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G and TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R and TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M and TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O and UVAROV, VA VALENTI, G VALLAZZA, E FERRER, JAV and VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VANDERVELDE, C and VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W and VERBEURE, F VERTOGRADOV, LS VIBERT, L VILANOVA, D and VISHNEVSKY, N VLASOV, EV VLASSOPOULOS, S VODOPYANOV, AS and VOLLMER, M VOLPONI, S VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J and WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D and WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A and ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E and ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ and ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: We have searched for pair produced scalar leptoquarks each decaying to a quark and a charged lepton in a sample of 116 000 hadronic Z0 events produced at LEP. No candidate was detected and cross section and branching ratio limits are set for the above process at 95% CL. Mass limits are found to be about 42 GeV/c2 depending only slightly on the models used and a coupling times branching ratio exclusion line is drawn for a scalar leptoquark with a free coupling. We have also probed the mass region above 45 GeV/c2 for a singly produced scalar leptoquark and set limits on the cross section and the coupling lambda(2)/4-pi up to 60 GeV.
Published: 1992

229. Measurement of the partial width of the Z0 into b Mathematical expression final states using their semi-leptonic decays

Author: Abreu, P. Adam, W. Adye, T. Agasi, E. Alekseev, G.D. Allen, P. Almehed, S. Alvsvaag, S.J. Amaldi, U. Anassontzis, E.G. Andreazza, A. Antilogus, P. Apel, W.-D. Apsimon, R.J. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barate, R. Barbiellini, G. Bardin, D.Y. Baroncelli, A. Barring, O. Barrio, J.A. Bartl, W. Bates, M.J. Battaglia, M. Baubillier, M. Becks, K.-H. Beeston, C.J. Begalli, M. Beilliere, P. Belokopytov, Yu. Beltran, P. Benedic, D. Berggren, M. Bertrand, D. Bianchi, F. Bilenky, M.S. Billoir, P. Bjarne, J. Bloch, D. Blyth, S. Bocci, V. Bogolubov, P.N. Bolognese, T. Bonesini, M. Bonivento, W. Booth, P.S.L. Borgeaud, P. Borisov, G. Borner, H. Bosio, C. Bostjancic, B. Bosworth, S. Botner, O. Bouquet, B. Bourdarios, C. Bowcock, T.J.v. Bozzo, M. Braibant, S. Branchini, P. Brand, K.D. Brenner, R.A. Briand, H. Bricman, C. Brown, R.C.A. Brummer, N. Brunet, J.-M. Bugge, L. Buran, T. Burmeister, H. Buytaert, J.A.M.A. Caccia, M. Calvi, M. Camacho Rozas, A.J. Camporesi, T. Canale, V. Cao, F. Carena, F. Carroll, L. Caso, C. Castelli, E. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Cerrito, L. Chabaud, V. Chan, A. Charpentier, Ph. Chaussard, L. Chauveau, J. Checchia, P. Chelkov, G.A. Chevalier, L. Chliapnikov, P. Chorowicz, V. Chrin, J.T.M. Cirio, R. Clara, M.P. Collins, P. Contreras, J.L. Contri, R. Cortina, E. Cosme, G. Couchot, F. Crawley, H.B. Crennell, D. Crossetti, G. Crozon, M. Cuevas Maestro, J. Czellar, S. Dagoret, S. Dahl-Jensen, E. Dalmagne, B. Dam, M. Damgaard, G. Darbo, G. Daubie, E. Daum, A. Dauncey, P.D. Davenport, M. David, P. Da Silva, W. Defoix, C. Delikaris, D. Della Riccia, B.A. Delorme, S. Delpierre, P. Demaria, N. De Angelis, A. De Beer, M. De Boeck, H. De Boer, W. De Clercq, C. De Fez Laso, M.D.M. De Groot, N. De La Vaissiere, C. De Lotto, B. De Min, A. Dijkstra, H. Di Ciaccio, L. Djama, F. Dolbeau, J. Donszelmann, M. Doroba, K. Dracos, M. Drees, J. Dris, M. Dufour, Y. Eek, L.-O. Eerola, P.A.-M. Ehret, R. Ekelof, T. Ekspong, G. Elliot Peisert, A. Engel, J.-P. Fassouliotis, D. Fearnley, T.A. Feindt, M. Fenyuk, A. Fernandez Alonso, M. Ferrer, A. Filippas, T.A. Firestone, A. Foeth, H. Fokitis, E. Fontanelli, F. Forbes, K.A.J. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Furnival, K. Furstenau, H. Fuster, J. Galeazzi, G. Gamba, D. Garcia, C. Garcia, J. Gaspar, C. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gerber, J.-P. Giacomelli, P. Gokieli, R. Golob, B. Golovatyuk, V.M. Gomez Y Cadenas, J.J. Goobar, A. Gopal, G. Gorski, M. Gracco, V. Grant, A. Grard, F. Graziani, E. Grosdidier, G. Gross, E. Grosse-Wiesmann, P. Grossetete, B. Gumenyuk, S. Guy, J. Haedinger, U. Hahn, F. Hahn, M. Haider, S. Hajduk, Z. Hakansson, A. Hallgren, A. Hamacher, K. Hamel De Monchenault, G. Hao, W. Harris, F.J. Henkes, T. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Hietanen, I. Higgins, C.O. Higon, E. Hilke, H.J. Hodgson, S.D. Hofmokl, T. Holmes, R. Holmgren, S.-O. Holthuizen, D. Honore, P.F. Hooper, J.E. Houlden, M. Hrubec, J. Hulth, P.O. Hultqvist, K. Ioannou, P. Isenhower, D. Iversen, P.-S. Jackson, J.N. Jalocha, P. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Johnson, D. Jonker, M. Jonsson, L. Juillot, P. Kalkanis, G. Kalmus, G. Kapusta, F. Karlsson, M. Karvelas, E. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kesteman, J. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, N.J. Klein, H. Klempt, W. Klovning, A. Kluit, P. Koch-Mehrin, A. Koehne, J.H. Koene, B. Kokkinias, P. Kopf, M. Korcyl, K. Korytov, A.V. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Kramer, P.H. Krolikowski, J. Kronkvist, I. Krstic, J. Kruener-Marquis, U. Krupinski, W. Kulka, K. Kurvinen, K. Lacasta, C. Lambropoulos, C. Lamsa, J.W. Lanceri, L. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Leitner, R. Lemoigne, Y. Lemonne, J. Lenzen, G. Lepeltier, V. Levy, J.M. Lieb, E. Liko, D. Lillethun, E. Lindgren, J. Lindner, R. Lipniacka, A. Lippi, I. Loerstad, B. Lokajicek, M. Loken, J.G. Lopez-Fernandez, A. Lopez Aguera, M.A. Los, M. Loukas, D. Lozano, J.J. Lutz, P. Lyons, L. Maehlum, G. Maillard, J. Maltezos, A. Mandl, F. Marco, J. Margoni, M. Marin, J.-C. Markou, A. Maron, T. Marti, S. Mathis, L. Matorras, F. Matteuzzi, C. Matthiae, C. Mazzucato, M. Mc Cubbin, M. Mc Kay, R. Mc Nulty, R. Meola, G. Meroni, C. Meyer, W.T. Michelotto, M. Mikulec, I. Mitaroff, W.A. Mitselmakher, G.V. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Morettini, P. Mueller, H. Murray, W.J. Muryn, B. Myatt, G. Naraghi, F. Navarria, F.L. Negri, P. Nielsen, B.S. Nijjhar, B. Nikolaenko, V. Nilsen, P.E.S. Niss, P. Obraztsov, V. Olshevski, A.G. Orava, R. Ostankov, A. Osterberg, K. Ouraou, A. Paganoni, M. Pain, R. Palka, H. Papadopoulou, Th.D. Pape, L. Passeri, A. Pegoraro, M. Pennanen, J. Perevozchikov, V. Pernicka, M. Perrotta, A. Petrolini, A. Pettersen, T.E. Pierre, F. Pimenta, M. Pingot, O. Pol, M.E. Polok, G. Poropat, P. Privitera, P. Pullia, A. Radijicic, D. Ragazzi, S. Ratoff, P.N. Read, A.L. Redaelli, N.G. Regler, M. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, M. Ridky, J. Rinaudo, G. Roditi, I. Romero, A. Roncagliolo, I. Ronchese, P. Ronnqvist, C. Rosenberg, E.I. Rossi, S. Rossi, U. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann, V. Ruiz, A. Rybicki, K. Saarikko, H. Sacquin, Y. Sajot, G. Salt, J. Sanchez, J. Sannino, M. Schael, S. Schneider, H. Schyns, M.A.E. Sciolla, G. Scuri, F. Segar, A.M. Sekulin, R. Sessa, M. Sette, G. Seufert, R. Shellard, R.C. Siccama, I. Siegrist, P. Simonetti, S. Simonetto, F. Sisakian, A.N. Skaali, T.B. Skjevling, G. Smadja, G. Smith, G.R. Sosnowski, R. Spassoff, T.S. Spiriti, E. Squarcia, S. Staeck, H. Stanescu, C. Stapnes, S. Stavropoulos, G. Stichelbaut, F. Stocchi, A. Strauss, J. Straver, J. Strub, R. Szczekowski, M. Szeptycka, M. Szymanski, P. Tabarelli, T. Tavernier, S. Tchikilev, O. Theodosiou, G.E. Tilquin, A. Timmermans, J. Timofeev, V.G. Tkatchev, L.G. Todorov, T. Toet, D.Z. Toker, O. Torassa, E. Tortora, L. Trainor, M.T. Treille, D. Trevisan, U. Trischuk, W. Tristram, G. Troncon, C. Tsirou, A. Tsyganov, E.N. Turala, M. Turluer, M.-L. Tuuva, T. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Ueberschaer, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Valls Ferrer, J.A. Vander Velde, C. Van Apeldoorn, G.W. Van Dam, P. Van Doninck, W.K. Varela, J. Vaz, P. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Vertogradov, L.S. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vollmer, M. Volponi, S. Voulgaris, G. Voutilainen, M. Vrba, V. Wahlen, H. Walck, C. Waldner, F. Wayne, M. Wehr, A. Weierstall, M. Weilhammer, P. Werner, J. Wetherell, A.M. Wickens, J.H. Wikne, J. Wilkinson, G.R. Williams, W.S.C. Winter, M. Wormald, D. Woschnagg, K. Yamdagni, N. Yepes, P. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zhang, G. Zimin, N.I. Zito, M. Zuberi, R. Zukanovich Funchal, R. Zumerle, G. Zuniga, J.
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: The spectra of prompt electrons and muons from the semi-leptonic decays of heavy hadrons produced in Z0 decays have been used to measure the coupling of the Z0 to b quarks weighted by the B hadrons mean semi-leptonic branching fraction, giving a value: {Mathematical expression}. The data has also been used to measure the value of the fragmentation parameter, defined in the context of the LUND PS Model, version 7.2, giving: {Mathematical expression}. The corresponding value of the mean fraction of the beam energy taken by a B hadron in the fragmentation of a b quark is: {Mathematical expression}. If the values of {Mathematical expression} and ΓH are taken from the Standard Model, the following value is obtained for the mean semi-leptonic braching fraction of B hadrons: BRslb=(10.1±0.7)%. Taking the value of {Mathematical expression} from an independent analysis of DELPHI data based on the use of the boosted sphericity product, a value: BRslb=(10.1±1.3)% is obtained. © 1992 Springer-Verlag.
Published: 1992

230. PRODUCTION OF STRANGE PARTICLES IN THE HADRONIC DECAYS OF THE Z(0)

Author: ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T and ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ and ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY and BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D and BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V and BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M and BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H and BOSIO, C BOSTJANCIC, B BOTNER, O BOUQUET, B and BOURDARIOS, C BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA and BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H and BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC and CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F and CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A and CAVALLO, FR CERRITO, L CHAN, A CHAPKIN, M and CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D and CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S and DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P and DASILVA, W DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H and DEBOER, W DECLERCQ, C DELASO, MDMD DEGROOT, N and DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H and DICIACCIO, L DJAMA, F DOLBEAU, J DOLL, O DONSZELMANN, M and DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y and DULINSKI, W EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G and PEISERT, AE ENGEL, JP FALALEEV, V FASSOULIOTIS, D and FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A and FOETH, H FOKITIS, E FOLEGATI, P FONTANELLI, F and FORBES, KAJ FORSBACH, H FRANEK, B FRENKIEL, P FRIES, DC and FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K and FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P and GAZIS, EN GERBER, JP GIACOMELLI, P GLITZA, KW GOKIELI, R and GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G and GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E and GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B and GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z and HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH and HARRIS, FJ HECK, BW HENKES, T HERBST, I HERNANDEZ, JJ and HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E and HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M and HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P and ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P and JARLSKOG, G JEANMARIE, B JOHANSSON, EK JOHNSON, D and JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G and KAPUSTA, F KATSANEVAS, S KATSOUFIS, EC KERANEN, R and KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ and KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M and KORATZINOS, M KORCYL, K KORYTOV, AV KOURKOUMELIS, C and KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J and KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K and LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V and LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F and LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LETESSIERSELVON, A LIEB, E LIKO, D LILLETHUN, E and LINDGREN, J LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B and LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL and LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAGNUSSEN, N MAILLARD, J MALTEZOS, A and MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A and MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G and MATVEEV, M MAZZUCATO, M MCCUBBIN, M MCKAY, R and MCNULTY, R MENICHETTI, E MEOLA, G MERONI, C MEYER, WT and MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MURRAY, WJ MURYN, B MYATT, G NARAGHI, F and NAUKORZEN, U NAVARRIA, FL NEGRI, P NIELSEN, BS and NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V OESTERBERG, K and OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M and PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A and PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M and PERROTTA, A PIERRE, F PIMENTA, M PINGOT, O POL, ME and POLOK, G POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D and RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F and RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A and RONCAGLIOLO, I RONCHESE, P RONJIN, V RONNQVIST, C and ROSENBERG, EI ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T and RUCKSTUHL, W RUHLMANN, V RUIZ, A RYBICKI, K and SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E and SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M and SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P and SIMONETTI, S SIMONETTO, F SISSAKIAN, AN SKAALI, TB and SKJEVLING, G SMADJA, G SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C and STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J and STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P and TABARELLI, T TAVERNIER, S THEODOSIOU, GE TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TORASSA, E TORTORA, L TRAINOR, MT and TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R and TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S and UEBERSCHAER, B UEBERSCHAER, S ULLALAND, O UVAROV, V and VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C and VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F and VERTOGRADOV, LS VILANOVA, D VITALE, L VLASOV, E and VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S and VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C and WALDNER, F WAYNE, M WEILHAMMER, P WERNER, J and WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR and WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment
Abstract: An analysis of the production of strange particles from the decays of the Z0 boson into multihadronic final states is presented. The analysis is based on about 90 000 selected hadronic Z0 decays collected by the DELPHI detector at LEP in 1990. K(s)0, K* +/-, LAMBDA(LAMBDABAR) and XI- (XI+) have been identified by their characteristic decays. The measured production cross sections are compared with predictions of the Lund Monte Carlo tuned to data at PEP/PETRA energies.
Published: 1992

231. SEARCHES FOR HEAVY NEUTRINOS FROM Z-DECAYS

Author: ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T and ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ and ASMAN, B ASTIER, P AUGUSTIN, JE AUGUSTINUS, A BAILLON, P and BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ and BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ and BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P and BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M and BONESINI, M BONIVENTO, W BOOTH, PSL BORATAV, M BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B and BOTNER, O BOUQUET, B BOURDARIOS, C BOZZO, M BRAIBANT, S and BRANCHINI, P BRAND, KD BRENNER, RA BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T and BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC and CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHAPKIN, M and CHARPENTIER, P CHAUSSARD, L CHECCHIA, P CHELKOV, GA and CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G and COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M and MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E and DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E and DAUNCEY, PD DAVENPORT, M DAVID, P DEFOIX, C DELIKARIS, D and DELORME, S DELPIERRE, P DEMARIA, N DEANGELIS, A and DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD and DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A and DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J DOLL, O and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DULINSKI, W DZHELYADIN, R EEK, LO EEROLA, PAM and EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP and FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P and FONTANELLI, F FORBES, KAJ FORSBACH, H FRANEK, B and FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R and FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J and GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C and GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP and GIACOMELLI, P GLITZA, KW GOKIELI, R GOLOVATYUK, VM and CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V and GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E and GROSSEWIESMANN, P GROSSETETE, B GUY, J HAHN, F HAHN, M and HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A and HAMACHER, K DEMONCHENAULT, GH HARRIS, FJ HECK, BW and HENKES, T HERBST, I HERNANDEZ, JJ HERQUET, P HERR, H and HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD and HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D and HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO and HULTQVIST, K HUSSON, D IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P and JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F and KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J and KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H and KLEMPT, W KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M and KORCYL, K KORYTOV, AV KOSTIUKHIN, V KOURKOUMELIS, C and KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J and KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K and LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V and LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F and LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LETESSIERSELVON, A LIEB, E LIKO, D LILLETHUN, E and LINDGREN, J LIPNIACKA, A LIPPI, I LLOSA, R LOERSTAD, B and LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL and LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAGNUSSEN, N MAILLARD, J MALTEZOS, A and MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A and MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G and MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R and MENICHETTI, E MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M and MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T and MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H and MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAUKORZEN, U and NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B and NIKOLAENKO, V OBRAZTSOV, V OESTERBERG, K OLSHEVSKI, AG and ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M PAIN, R and PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M and PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A and PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G and POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D and RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M and RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, U and ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V and RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G and SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN and SKAALI, TB SKJEVLING, G SMADJA, G SMIRNOV, N SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F and STOCCHI, A STRAUSS, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S TCHIKILEV, O and THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG and TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TORASSA, E and TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN and TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA and TYNDEL, M TZAMARIAS, S UEBERSCHAER, B UEBERSCHAER, S and ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV and VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDONINCK, WK and VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W and VERBEURE, F VERTOGRADOV, LS VIBERT, L VILANOVA, D and VITALE, L VLASOV, E VLASOV, EV VLASSOPOULOS, S and VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G and VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F and WAYNE, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M and WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P and ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D and ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R and FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment
Abstract: We have searched for possible fourth family heavy neutrinos, pair produced in Z0 decays, in a sample of about 112 000 hadronic Z0 final states collected with the DELPHI detector. For all mixing matrix elements we exclude a new Dirac neutrino lighter than 44.5 GeV at a 95% confidence level, if the neutrino couples to the electron or muon family, and lighter than 44.0 GeV, if the neutrino couples to the tau family. Depending on the values of the mixing element and to which lepton family the neutrino couples, we obtain mass limits up to 46.2 GeV. For all mixing matrix elements we exclude a new Majorana neutrino lighter than 39.0 GeV, if it couples to the electron or the muon family, and lighter than 38.2 GeV, if it couples to the tau family. Depending on the values of the mixing matrix element and to which lepton family the neutrino couples, we obtain mass limits up to 44.7 GeV. We also exclude stable new Dirac neutrinos lighter than 45.0 GeV and new Majorana neutrinos lighter than 39.5 GeV.
Published: 1992

232. A SEARCH FOR NEUTRAL HIGGS PARTICLES IN Z(0) DECAYS

Author: ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T and ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ and ASMAN, B ASTIER, P AUGUSTIN, JE AUGUSTINUS, A BAILLON, P and BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARONCELLI, A BARRING, O BARTL, W BATES, MJ and BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ and BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P and BENEDIC, D BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S and BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONAPART, M and BONESINI, M BONIVENTO, W BOOTH, PSL BORATAV, M BORGEAUD, P BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B and BOTNER, O BOUQUET, B BOZZO, M BRAIBANT, S BRANCHINI, P and BRAND, KD BRENNER, RA BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H and BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, A and CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L and CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHAN, A CHARPENTIER, P CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R and COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D and CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAGORET, S and DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUNCEY, PD DAVENPORT, M DAVID, P and DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C and LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B and DEMIN, A DEFOIX, C DELIKARIS, D DELORME, S DELPIERRE, P and DEMARIA, N DERKAOUI, J DICIACCIO, L DIJKSTRA, H and DJAMA, F DOLBEAU, J DOLL, O DONSZELMANN, M DOROBA, K and DRACOS, M DREES, J DRIS, M DUFOUR, Y DULINSKI, W and EEK, LO EEROLA, PAM EKELOF, T EKSPONG, G PEISERT, AE and ENGEL, JP FASSOULIOTIS, D FEINDT, M FENYUK, A ALONSO, MF and FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H and FOKITIS, E FOLEGATI, P FONTANELLI, F FORBES, KAJ and FORSBACH, H FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG and FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H and FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J and GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GLITZA, KW GOKIELI, R GOLOVATYUK, VM and CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V and GRANT, A GRARD, F GRAZIANI, E GROS, MH GROSDIDIER, G and GROSS, E GROSSETETE, B GROSSEWIESMANN, P GUMENYUK, S and GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z and HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH and HARRIS, FJ HECK, BW HENKES, T HERBST, I HERNANDEZ, JJ and HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E and HILKE, HJ HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONOREPF HOOPER, JE HOULDEN, M and HRUBEC, J HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P and ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P and JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G and KALMUS, G KAPUSTA, F KATSANEVAS, S KATSOUFIS, EC and KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W KLOVNING, A KLUIT, P and KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV KOSTRIKOV, M and KOURKOUMELIS, C KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I and KRSTIC, J KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W and KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW and LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G and LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LETESSIERSELVON, A LIKO, D LIEB, E and LILLETHUN, E LINDGREN, J LIPNIACKA, A LIPPI, I LLOSA, R and LOERSTAD, B LOKAJICEK, M LOKEN, JG AGUERA, MAL and LOPEZFERNANDEZ, A LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ and LUCOCK, R LUTZ, P LYONS, L MAEHLUM, G MAGNUSSEN, N and MAILLARD, J MALTEZOS, A MANDL, F MARCO, J MARGONI, M and MARIN, JC MARKOU, A MARTI, S MATHIS, L MATORRAS, F and MATTEUZZI, C MATTHIAE, G MATVEEV, M MAZZUCATO, M and MCCUBBIN, M MCKAY, R MCNULTY, R MENICHETTI, E MEOLA, G and MERONI, C MEYER, WT MICHELOTTO, M MITAROFF, WA and MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ and MYATT, G NARAGHI, F NAUKORZEN, U NAVARRIA, FL NEGRI, P and NIELSEN, BS NIJJHAR, B NIKOLAENKO, V OBRAZTSOV, V and OLSHEVSKI, AG ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M and PAIN, R PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A and PEGORARO, M PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A and PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G and POROPAT, P PRIVITERA, P PULLIA, A PYYHTIA, J RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG and REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F and RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A and RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI and ROSSI, U ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W and RUHLMANN, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M and SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE and SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G and SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S and SIMONETTO, F SISSAKIAN, AN SKAALI, TB SKJEVLING, G and SMADJA, G SMITH, GR SMIRNOV, N SOSNOWSKI, R SPASSOFF, TS and SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C and STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J and STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P and TABARELLI, T TAVERNIER, S THEODOSIOU, G TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TORTORA, L TRAINOR, MT TREILLE, D TREVISAN, U and TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURCHETTA, R TURLUER, ML TUUVA, T and TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, B and UEBERSCHAER, S ULLALAND, O UVAROV, VA VALENTI, G and VALLAZZA, E FERRER, JAV VANAPELDOORN, GW VANDAM, P and VANDONINCK, WK VANDERVELDE, C VARELA, J VAZ, P VEGNI, G and VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS and VIBERT, L VILANOVA, D VITALE, L VLASOV, EV VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G and VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F and WAYNE, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M and WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P and ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D and ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R and FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: The search in DELPHI data for neutral Higgs bosons is described. No candidate for the Standard Model Higgs is seen in Z0 decays to H-0-nu-nuBAR, H-0-mu+-mu- or H-0-tau+-tau- after selections that proved efficient for finding simulated H-0. One remaining candidate for Z0 –> H-0e+ e- is consistent with background. Together with our earlier studies, these results restrict the H-0 mass to be above 38 GeV/c2 at the 95% confidence level. No signal is found for decays of Minimal Supersymmetric Standard Model neutral Higgs bosons to tau+-tau-. Limits are obtained for their decays to produce four jets.
Published: 1992

233. Multiplicity fluctuations in hadronic final states from the decay of the Z0

Author: Abreu, P., Adam, W., Adye, T., Agasi, E., Alekseev, G. D., Algeri, A., Allen, P., Almehed, S., Alvsvaag, S. J., Amaldi, U., Anassontzis, E., Andreazza, A., Antilogus, P., Apel, W. D., Apsimon, R. J., Asman, B., Augustin, J. E., Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, G., Bardin, D. Y. u., Baroncelli, A., Barring, O., Barrio, J. A., Bartl, W., Bates, M. J., Battaglia, M., Baubillier, M., Becks, K. H., Beeston, C. J., Begalli, M., Beilliere, P., Belokopytov, Y. u., Beltran, P., Benedic, D., Benvenuti, A. C., Berggren, M., Bertrand, D., Bianchi, Fabrizio, Bilenky, Mikhail S., Pierre, Billoir, Bjarne, J., Bloch, D., Blyth, S., Bocci, V., Bogolyubov, P., Bolognese, T., Bonesini, M., Bonivento, W., Booth, P. S. L., Borgeaud, P., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Bosworth, S., Botner, O., Bouquet, B., Bourdarios, C., Bowcock, T. J. V., Bozzo, M., Braibant, S., Branchini, P., Brand, K. D., Brenner, R. A., Briand, H., Bricman, C., Brown, R. C. A., Brummer, N., Brunet, J. M., Bugge, L., Buran, T., Burmeister, H., Buytaert, J. A. M. A., Caccia, M., Calvi, M., Camacho Rozas, A. J., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., Caso, C., Castillo Gimenez, M. V., Cattai, A., Cavallo, F. R., Cerrito, L., Chabaud, V., Chan, A., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, G. A., Chevalier, L., Chliapnikov, P., Chorowicz, V., Chrin, J. T., Cirio, Roberto, Clara, M. P., Collins, P., Contreras, J. L., Contri, R., Cortina, E., Cosme, G., Couchot, F., Crawley, H. B., Crennell, D., Crosetti, G., Crozon, M., Cuevas Maestro, J., Czellar, S., Dahl Jensen, E., D'Almagne, B., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Daum, A., Dauncey, Paul D., Davenport, M., David, P., Da Silva, W., Defoix, C., Delikaris, D., Delorme, S., Delpierre, P., Demaria, N., De Angelis, A., De Beer, M., De Boeck, H., de Boer, W., De Clercq, C., De Fez Laso, M. D. M., De Groot, N., de la Vaissiere, C., De Lotto, B., De Min, A., Dijkstra, H., Di Ciaccio, L., Djama, F., Dolbeau, J., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Eek, L. O., Eerola, P. A. M., Ehret, R., Ekelof, T., Ekspong, G., Elliot Peisert, A., Engel, J. P., Fassouliotis, D., Feindt, M., Fernandez Alonso, M., Ferrer, A., Filippas, T. A., Firestone, A., Foeth, H., Fokitis, E., Fontanelli, F., Forbes, K. A. J., Fousset, J. L., Francon, S., Franek, B., Frenkiel, P., Fries, D. C., Frodesen, A. G., Fruhwirth, R., Fulda Quenzer, F., Furnival, K., Furstenau, H., Fuster, J., Galeazzi, G., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Evangelos, Gazis, Gerber, J. P., Giacomelli, P., Gokieli, R., Golob, B., Golovatyuk, V. M., Cadenas, J. J. Gomez y., Goobar, A., Gopal, G., Gorski, M., Gracco, V., Grant, A., Grard, F., Graziani, E., Grosdidier, G., Gross, E., Grossetete, B., Grosse Wiesmann, P., Guy, J., Haedinger, U., Hahn, F., Hahn, M., Haider, S., Hajduk, Z., Hakansson, A., Hallgren, A., Hamacher, K., Hamel de Monchenault, G., Hao, W., Harris, F. J., Henkes, T., Hernandez, J. J., Herquet, P., Herr, H., Hessing, T. L., Hietanen, I., Higgins, C. O., Higon, E., Hilke, H. J., Hodgson, S. D., Hofmokl, T., Holmes, R., Holmgren, S. O., Holthuizen, D., Honore, P. F., Hooper, J. E., Houlden, M., Hrubec, J., Huet, C., Hulth, P. O., Hultqvist, K., Ioannou, P., Isenhower, D., Iversen, P. S., John Neil Jackson, Jalocha, P., Jarlskog, G., Jarry, P., Jean Marie, B., Erik Karl Johansson, Johnson, D., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalmus, G., Frederic, Kapusta, Karlsson, M., Karvelas, E., Katsanevas, S., Katsoufis, E. C., Keranen, R., Kesteman, J., Khomenko, B. A., Khovansky, N. N., King, B., Kjaer, N. J., Hansjorg, Klein, Klempt, W., Klovning, A., Kluit, P., Koch Mehrin, A., Kohne, J. H., Koene, B., Kokkinias, P., Kopf, M., Korcyl, K., Korytov, A. V., Kostukhin, V., Kourkoumelis, C., Kouznetsov, O., Paul Heinz Kramer, Krolikowski, J., Kronkvist, I., Krstic, J., Kruner Marquis, U., Krupinski, W., Kulka, K., Kurvinen, K., Carlos, Lacasta, Lambropoulos, C., Lamsa, J. W., Lanceri, L., Lapin, V., Laugier, J. P., Lauhakangas, R., Leder, G., Fabienne, Ledroit, Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Levy, J. M., Elmar, Lieb, Liko, D., Lillethun, E., Lindgren, J., Lindner, R., Lipniacka, A., Lippi, I., Lorstad, B., Lokajicek, M., Loken, J. G., Lopez Fernandez, A., Lopez Aguera, M. A., Los, M., Loukas, D., Lozano, J. J., Lutz, P., Lyons, L., Mahlum, G., Maillard, J., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, J. C., Markou, A., Maron, T., Marti, S., Mathis, L., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Meola, G., Meroni, C., Meyer, W. T., Michelotto, M., Mikulec, I., Mirabito, L., Mitaroff, W. A., Guenakh, Mitselmakher, Mjornmark, U., Moa, T., Rasmus, Moller, Klaus, Monig, Monge, M. R., Morettini, P., Muller, H., Murray, W. J., Muryn, B., Myatt, G., Naraghi, F., Navarria, F. L., Negri, P., Nielsen, B. S., Nijjhar, B., Nikolaenko, V., Nilsen, P. E. S., Niss, P., Obraztsov, V., Olshevski, A. G., Orava, R., Ostankov, A., Osterberg, K., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T., Pape, L., Passeri, A., Pegoraro, M., Pennanen, J., Perevozchikov, V., Pernicka, M., Perrotta, A., Petridou, C., Petrolini, A., Pettersen, T. E., Pierre, F., Pimenta, M., Pingot, O., Pol, M. E., Polok, G., Poropat, P., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Rahmani, H., Ratoff, P. N., Read, Alexander L., Nicola Giuseppe Redaelli, Regler, M., Reid, D., Renton, P. B., Resvanis, L. K., Richard, F., Richardson, M., Ridky, J., Rinaudo, G., Roditi, I., Romero, Alessandra, Roncagliolo, I., Ronchese, P., Ronnqvist, C., Rosenberg, E. I., Rossi, S., Rossi, U., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmann, V., Ruiz, A., Rybicki, K., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, J., Sannino, M., Schael, S., Schneider, H., Schyns, M. A. E., Sciolla, G., Fabrizio, Scuri, Segar, A. M., Sekulin, R., Sessa, M., Sette, G., Seufert, R., Shellard, R. C., Siccama, I., Siegrist, P., Simonetti, S., Simonetto, F., Sisakian, A. N., Skaali, T. B., Skjevling, G., Smadja, G., Smith, G. R., Sosnowski, R., Spassov, T. S., Spiriti, E., Squarcia, S., Stack, H., Stanescu, C., Stapnes, S., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Straver, J., Strub, R., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tavernier, S., Chikilev, O., Theodosiou, G., Tilquin, A., Jan, Timmermans, Timofeev, V. G., Tkachev, L. G., Todorov, T., Toet, D. Z., Toker, O., Torassa, E., Tortora, L., Trainor, M. T., Treille, D., Trevisan, U., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, E. N., Turala, M., Turluer, M. L., Tuuva, T., Tyapkin, I. A., Tyndel, M., Tzamarias, S., Uberschar, S., Ullaland, O., Uvarov, V. A., Valenti, G., Vallazza, E., Valls Ferrer, J. A., Vander Velde, C., van Apeldoorn, G. W., Piet van Dam, Walter Van Doninck, Vaz, P., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Vertogradov, L. S., Vilanova, D., Vincent, P., Vitale, L., Vlasov, E., Vodopianov, A. S., Vollmer, M., Voulgaris, G., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wayne, M., Wehr, A., Weierstall, M., Weilhammer, P., Werner, J., Wetherell, A. M., Wickens, J. H., Wikne, J., Wilkinson, G. R., Williams, W. S. C., Winter, M., Wormald, D., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zhang, G., Zimin, N. I., Zito, M., Zuberi, R., Zukanovich Funchal, R., Zumerle, G., Zuniga, J., Delphi, Collaboration, Abreu, P., Adam, W., Canale, Vincenzo, Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), DELPHI, Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nuclear and High Energy Physics, Factorial, Particle physics, E+E ANNIHILATION, LUND MONTE-CARLO, Monte Carlo method, Parton, MULTIPARTICLE PRODUCTION, 01 natural sciences, 7. Clean energy, JET FRAGMENTATION, Nuclear physics, Particle decay, RAPIDITY DISTRIBUTIONS, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Rapidity, Z0, 010306 general physics, Parton shower, HIGH-ENERGY COLLISIONS, Quantum chromodynamics, Physics, 010308 nuclear & particles physics, INTERMITTENCY ANALYSIS, QCD, SIMULATION, Gluon, High Energy Physics::Experiment, Física nuclear, Particle Physics - Experiment
Abstract: An analysis of the fluctuations in the phase space distribution of hadrons produced in the decay of 78829 Z0 has been carried out, using the method of factorial moments. The high statistics collected by the DELPHI experiment at LEP during 1990 allowed studies of the event sample both globally and in intervals of p(t) and multiplicity, and for different jet topologies and for single jets. A large contribution to the factorial moments of the one-dimensional data on rapidity with respect to the event axis comes from hard gluons. Details of factorial moments in two and three dimensions are presented. Influences of resonance decays have been studied by Monte Carlo simulation: one-dimensional factorial moments at low p(t), and two-, three-dimensional analyses are affected. Parton shower models describe the data reasonably well.
Published: 1992

234. Classification of the hadronic decays of the Z$^0$ into b and c quark pairs using a neural network

Author: Abreu, P., Adam, W., Adye, T., Agasi, E., Alekseev, G. D., Algeri, A., Allen, P., Almehed, S., Alvsvaag, S. J., Amaldi, U., Anassontzis, E. G., Andreazza, A., Antilogus, P., Apel, W. D., Apsimon, R. J., Asman, B., Augustin, J. E., Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, G., Bardin, D. Y., Barker, G., Baroncelli, A., Barring, O., Barrio, J. A., Bartl, W., Bates, M. J., Battaglia, M., Baubillier, M., Becks, K. H., Beeston, C. J., Begalli, M., Beilliere, P., Belokopytov, Y., Beltran, P., Benedic, D., Benvenuti, A. C., Berggren, M., Bertrand, D., Bianchi, F., Bilenky, M. S., Billoir, P., Bjarne, J., Bloch, D., Blyth, S., Bocci, V., Bogolubov, P. N., Bolognese, T., Bonesini, M., Bonivento, W., P. S. L., Borgeaud, P., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Bosworth, S., Botner, O., Bouquet, B., Bourdarios, C., T. J. V., Bozzo, M., Braibant, S., Branchini, P., Brand, K. D., Brenner, R. A., Briand, H., Bricman, C., R. C. A., Brummer, N., Brunet, J. M., Bugge, L., Buran, T., Burmeister, H., J. A. M., Caccia, M., Calvi, M., A. J. C., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., Caso, C., M. V. C., Cattai, A., Cavallo, F. R., Cerrito, L., Chabaud, V., Chan, A., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, G. A., Chevalier, L., Chliapnikov, P., Chorowicz, V., J. T. M., Ciuchini, M., Clara, M. P., Collins, P., Contreras, J. L., Contri, R., Cortina, E., Cosme, G., Cosmo, G., Couchot, F., Crawley, H. B., Crennell, D., Crosetti, G., Crozon, M., Maestro, J. C., Czellar, S., Dahljensen, E., Dalmagne, B., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Daum, A., Dauncey, P. D., Davenport, M., David, P., Dasilva, W., Defoix, C., Delikaris, D., Delorme, S., Delpierre, P., Delgiudice, P., Demaria, N., Deangelis, A., Debeer, M., Deboeck, H., Deboer, W., Declercq, C., M. D. M., Degroot, N., Delavaissiere, C., Delotto, B., Demin, A., Dijkstra, H., Diciaccio, L., Diama, F., Dolbeau, J., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Eek, L. O., P. A. M., Ehret, R., Ekelof, T., Ekspong, G., Peisert, A. E., Engel, J. P., Fassouliotis, D., Feindt, M., Alonso, M. F., Ferrer, A., Filippas, T. A., Firestone, A., Foeth, H., Fokitis, E., Fontanelli, F., K. A. J., Fousset, J. L., Francon, S., Franek, B., Frenkiel, P., Fries, D. C., Frodesen, A. G., Fruhwirth, R., Fuldaquenzer, F., Furnival, K., Furstenau, H., Fuster, J., Galeazzi, G., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, E. N., Gerber, J. P., Giacomelli, P., Gokieli, R., Golob, B., Goloyatyuk, V. M., J. J. G., Goobar, A., Gopal, G., Gorski, M., Gracco, V., Grant, A., Grard, F., Graziani, E., Grosdidier, G., Gross, E., Grossewiesmann, P., Grossetete, B., Gumenyuk, S., Guy, J., Haedinger, U., Hahn, F., Hahn, M., Haider, S., Hajduk, Z., Hakansson, A., Hallgren, A., Hamacher, K., Demonchenault, G. H., Hao, W., Harris, F. J., Henkes, T., Hernandez, J. J., Herquet, P., Herr, H., Hessing, T. L., Hietanen, I., Higgins, C. O., Higon, E., Hilke, H. J., Hodgson, S. D., Hofmokl, T., Holmes, R., Holmgren, S. O., Holthuizen, D., Honore, P. F., Hooper, J. E., Houlden, M., Hrubec, J., Huet, C., Hulth, P. O., Hultqvist, K., Ioannou, P., Isenhower, D., Iversen, P. S., Jackson, J. N., Jalocha, P., Jarlskog, G., Jarry, P., Jeanmarie, B., Johansson, E. K., Johnson, D., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalkkinen, J., Kalmus, G., Kapusta, F., Karlsson, M., Karvelas, E., Katsanevas, S., Katsoufis, E. C., Keranen, R., Kesteman, J., Khomenko, B. A., Khovanski, N. N., King, B., Kjaer, N. J., Klein, H., Klempt, W., Klovning, A., Kluit, P., Kochmehrin, A., Koehne, J. H., Koene, B., Kokkinias, P., Kopf, M., Korcyl, K., Korytov, A. V., Kostioukhine, V., Kourkoumelis, C., Kouznetsov, O., Kramer, P. H., Krolikowski, J., Kronkvist, I., Kruenermarquis, U., Kucewicz, W., Kulka, K., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, J. W., Lanceri, L., Lapin, V., Laugier, J. P., Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Lesiak, T., Levy, J. M., Lieb, E., Liko, D., Lindgren, J., Lindner, R., Lipniacka, A., Lippi, I., Loerstad, B., Lokajicek, M., Loken, J. G., Lopezfernandez, A., M. A. L., Los, M., Loukas, D., Lozano, J. J., Lutz, P., Lyons, L., Maehlum, G., Maillard, J., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, J. C., Markou, A., Maron, T., Marti, S., Mathis, L., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Meola, G., Meroni, C., Meyer, W. T., Michelotto, M., Mikulec, I., Mirabito, L., Mitaroff, W. A., Mitselmakher, G. V., Mjoernmark, U., Moa, T., Moeller, R., Moenig, K., Monge, M. R., Morettini, P., Mueller, H., Murray, W. J., Myatt, G., Naraghi, F., Navarria, F. L., Negri, P., Nielsen, B. S., Nijjhar, B., Nikolaenko, V., P. E. S., Niss, P., Obraztsov, V., Olshevski, A. G., Orava, R., Ostankov, A., Osterberg, K., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T. D., Pape, L., Passeri, A., Pegoraro, M., Pennanen, J., Perevozchikov, V., Pernicka, M., Perrotta, A., Petridou, C., Petrolini, A., Petrovykh, L., Pettersen, T. E., Pierre, F., Pimenta, M., Pingot, O., Plaszczynski, S., Pol, M. E., Polok, G., Poropat, P., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Rahmani, H., Ratoff, P. N., Read, A. L., Redaelli, N. G., Regler, M., Reid, D., Renton, P. B., Resvanis, L. K., Richard, F., Richardson, M., Ridky, J., Rinaudo, G., Roditi, I., Romero, Alessandra, Roncagliolo, I., Ronchese, P., Ronnqvist, C., Rosenberg, E. I., Rossi, S., Rossi, U., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmannkleider, V., Ruiz, A., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, J., Sannino, M., Schael, S., Schneider, H., Schulze, B., M. A. E., Sciolla, G., Scuri, F., Segar, A. M., Sekulin, R., Sessa, M., Sette, G., Seufert, R., Shellard, R. C., Siccama, I., Siegrist, P., Simonetti, S., Simonetto, F., Sisakian, A. N., Skaali, T. B., Skjevling, G., Smadja, G., Smith, G. R., Sosnowski, R., Spassoff, T. S., Spiriti, E., Squarcia, S., Staeck, H., Stanescu, C., Stapnes, S., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Straver, J., Strub, R., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tavernier, S., Tchikilev, O., Theodosiou, G. E., Tilquin, A., Timmermans, J., Timofeev, V. G., Tkatchev, I. G., Todorov, T., Toet, D. Z., Toker, O., Torassa, E., Tortora, L., Treille, D., Trevisan, U., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, E. N., Turluer, M. L., Tuuva, T., Tyapkin, I. A., Tyndel, M., Tzamarias, S., Ueberschaer, S., Ullaland, O., Uvarov, V., Valenti, G., Vallazza, E., J. A. V., Vandervelde, C., Vanapeldoorn, G. W., Vandam, P., Vanderheijden, M., Vandoninck, W. K., Vaz, P., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Vertogradov, L. S., Vilanova, D., Vincent, P., Vitale, L., Vlasov, E., Vodopyanov, A. S., Vollmer, M., Voulgaris, G., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wayne, M., Wehr, A., Weierstall, M., Weilhammer, P., Werner, J., Wickens, J. H., Wikne, J., Wilkinson, G. R., W. S. C., Winter, M., Witek, M., Wormald, D., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zhang, G., Zimin, N. I., Zito, M., Zuberi, R., Funchal, R. Z., Zumerle, G., Zuniga, J., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), DELPHI, Delphi, Collaboration, Abreu, P., Adam, W., Canale, Vincenzo, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)
Subjects: Quark, Nuclear and High Energy Physics, Particle physics, LUND MONTE-CARLO, HEAVY FLAVOR PRODUCTION, JET FRAGMENTATION, PHYSICS, BOSON, Electron–positron annihilation, Flavour, Hadron, MathematicsofComputing_GENERAL, Computer Science::Digital Libraries, 01 natural sciences, Charm quark, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Physics, Artificial neural network, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, TheoryofComputation_GENERAL, MathML, Computer Science::Mathematical Software, High Energy Physics::Experiment, Física nuclear, Classifier (UML), Particle Physics - Experiment
Abstract: A classifier based on a feed-forward neural network has been used for separating a sample of about 123 500 selected hadronic decays of the Z 0 , collected by DELPHI during 1991, into three classes according to the flavour of the original quark pair: u u +d d +s s (unresolved), c c and b b . The classification has been used to compute the partial widths of the Z 0 into b and c quark pairs. This gave Γ c c /Γ h = 0.151 ± 0.008 ( stat. ) ± 0.041 ( syst. ) , Γ b b /Γ h = 0.232±0.005 ( stat. )±0.017 ( syst. ) .
Published: 1992

235. Study of final state photons in hadronic decay and limits on new phenomena

Author: Abreu, P., Adam, W., Adami, F., Adye, T., Akesson, T., Alekseev, G. D., Allen, P., Almehed, S., Alvsvaag, S. J., Amaldi, U., Anassontzis, E., Antilogus, P., Apel, W., Apsimon, R. J., Åsman, B., Astier, P., Augustin, J., Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, G., Bardin, D. Y., Baroncelli, A., Barring, O., Bartl, W., Bates, M. J., Battaglia, M., Baubillier, M., Becks, K., Beeston, C. J., Begalli, M., Beilliere, P., Belokopytov, Y., Beltran, P., Benedic, D., Benlloch, J. M., Berggren, M., Bertrand, D., Bianchi, F., Bilenky, M. S., Billoir, P., Bjarne, J., Bloch, D., Blyth, S., Bocci, V., Bogolubov, P. N., Bolognese, T., Bonapart, M., Bonesini, M., Bonivento, W., P. S. L., Boratav, M., Borgeaud, P., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Botner, O., Bouquet, B., Bozzo, M., Braibant, S., Branchini, P., Brand, K. D., Brenner, R. A., Bricman, C., R. C. A., Brummer, N., Brunet, J., Bugge, L., Buran, T., Burmeister, H., J. A. M., Caccia, M., Calvi, M., Camacho, A. J., Campion, A., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., Caso, C., Castelli, E., Castillo, M. V., Cattai, A., Cavallo, F. R., Cerrito, L., Chan, A., Chapkin, M., Charpentier, P., Checchia, P., Chelkov, G. A., Chevalier, L., Chliapnikov, P., Chorowicz, V., Cirio, Roberto, Clara, M. P., Collins, P., Contreras, J. L., Contri, R., Cosme, G., Couchot, F., Crawley, H. B., Crennell, D., Crosetti, G., Crozon, M., Maestro, J. C., Czellar, S., Dagoret, S., Dahl Jensen, E., Dalmagne, B., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Dauncey, P. D., Davenport, M., David, P., Angelis, A. D., Beer, M. D., Boeck, H. D., Boer, W. D., Clercq, C. D., M. D. M., Groot, N. D., C. D., La, Lotto, B. D., Min, A. D., Defoix, C., Delikaris, D., Delorme, S., Delpierre, P., Demaria, N., Ciaccio, L. D., Dijkstra, H., Djama, F., Dolbeau, J., Doll, O., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Dulinski, W., Eek, L., P. A. M., Ekelof, T., Ekspong, G., Peisert, A. E., Engel, J., Fassouliotis, D., Feindt, M., Alonso, M. F., Ferrer, A., Filippas, T. A., Firestone, A., Foeth, H., Fokitis, E., Folegati, P., Fontanelli, F., K. A. J., Forsbach, H., Franek, B., Frenkiel, P., Fries, D. C., Frodesen, A. G., Fruhwirth, R., Fulda Quenzer, F., Furnival, K., Furstenau, H., Fuster, J., Galeazzi, G., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, E. N., Gerber, J., Giacomelli, P., Glitza, K., Gokieli, R., Golovatyuk, V. M., Gomez, J. J., Goobar, A., Gopal, G., Gorski, M., Gracco, V., Grant, A., Grard, F., Graziani, E., Gros, M., Grosdidier, G., Gross, E., Grossetete, B., Grosse Wiesmann, P., Guy, J., Hahn, F., Hahn, M., Haider, S., Hajduk, Z., Hakansson, A., Hallgren, A., Hamacher, K., G. H., De, Harris, F. J., Heck, B. W., Henkes, T., Herbst, I., Hernandez, J. J., Herquet, P., Herr, H., Hietanen, I., Higgins, C. O., Higon, E., Hilke, H. J., Hodgson, S. D., Hofmokl, T., Holmes, R., Holmgren, S., Holthuizen, D., Honore, P. F., Hooper, J. E., Houlden, M., Hrubec, J., Hulth, P. O., Hultqvist, K., Husson, D., Ioannou, P., Isenhower, D., Iversen, P., Jackson, J. N., Jalocha, P., Jarlskog, G., Jarry, P., Jean Marie, B., Johansson, E. K., Johnson, D., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalmus, G., Kapusta, F., Katsanevas, S., Katsoufis, E. C., Keranen, R., Kesteman, J., Khomenko, B. A., Khovanski, N. N., King, B., Kjaer, N. J., Klein, H., Klempt, W., Klovning, A., Kluit, P., Koch Mehrin, A., Koehne, J. H., Koene, B., Kokkinias, P., Kopf, M., Koratzinos, M., Korcyl, K., Korytov, A. V., Kostukhin, V., Kourkoumelis, C., Kreuzberger, T., Krolikowski, J., Kronkvist, I., Krstic, J., Kruener Marquis, U., Krupinski, W., Kucewicz, W., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, J. W., Lanceri, L., Lapin, V., Laugier, J., Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Letessier Selvon, A., Liko, D., Lieb, E., Lillethun, E., Lindgren, J., Lipniacka, A., Lippi, I., Llosa, R., Loerstad, B., Lokajicek, M., Loken, J. G., Lopez, M. A., Lopez Fernandez, A., Los, M., Loukas, D., Lounis, A., Lozano, J. J., Lucock, R., Lutz, P., Lyons, L., Maehlum, G., Magnussen, N., Maillard, J., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, J., Markou, A., Marti, S., Mathis, L., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Menichetti, Ezio, Meola, G., Meroni, C., Meyer, W. T., Michelotto, M., Mitaroff, W. A., Mitselmakher, G. V., Mjoernmark, U., Moa, T., Moeller, R., Moenig, K., Monge, M. R., Morettini, P., Mueller, H., Murray, W. J., Myatt, G., Naraghi, F., Nau Korzen, U., Navarria, F. L., Negri, P., Nielsen, B. S., Nijjhar, B., Nikolaenko, V., Obraztsov, V., Olshevski, A. G., Orava, R., Ostankov, A., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T., Pape, L., Passeri, A., Pegoraro, M., Perevozchikov, V., Pernicka, M., Perrotta, A., Pierre, F., Pimenta, M., Pingot, O., Pol, M. E., Polok, G., Poropat, P., Privitera, P., Pullia, A., Pyyhtia, J., Radojicic, D., Ragazzi, S., Ratoff, P. N., Read, A. L., Redaelli, N. G., Regler, M., Reid, D., Renton, P. B., Resvanis, L. K., Richard, F., Richardson, M., Ridky, J., Rinaudo, G., Roditi, I., Romero, A., Roncagliolo, I., Ronchese, P., Ronjin, V., Ronnqvist, C., Rosenberg, E. I., Rossi, U., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmann, V., Ruiz, A., Rybicki, K., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, E., Sanchez, J., Sannino, M., Schaeffer, M., Schael, S., Schneider, H., M. A. E., Scuri, F., Segar, A. M., Sekulin, R., Sessa, M., Sette, G., Seufert, R., Shellard, R. C., Siegrist, P., Simonetti, S., Simonetto, F., Sissakian, A. N., Skaali, T. B., Skjevling, G., Smadja, G., Smirnov, N., Smith, G. R., Sosnowski, R., Spasoff, T. S., Spiriti, E., Squarcia, S., Staeck, H., Stanescu, C., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Strub, R., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tavernier, S., Theodosiou, G. E., Tilquin, A., Timmermans, J., Timofeev, V. G., Tkatchev, L. G., Todorov, T., Toet, D. Z., Torassa, E., Tortora, L., Trainor, M. T., Treille, D., Trevisan, U., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, E. N., Turala, M., Turchetta, R., Turluer, M., Tuuva, T., Tyapkin, I. A., Tyndel, M., Tzamarias, S., Ueberschaer, B., Ueberschaer, S., Ullaland, O., Uvarov, V. A., Valenti, G., Vallazza, E., Valls, J. A., Van, G. W., Dam, P. V., Van, W. K., Velde, C. V., Varela, J., Vaz, P., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Vertogradov, L. S., Vibert, L., Vilanova, D., Vishnevsky, N., Vitale, L., Vlasov, E. V., Vlassopoulos, S., Vodopyanov, A. S., Vollmer, M., Volponi, S., Voulgaris, G., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wayne, M., Weilhmmer, P., Werner, J., Wetherell, A. M., Wickens, J. H., Wikne, J., Wilkinson, G. R., W. S. C., Winter, M., Wormald, D., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zhang, G., Zimin, N. I., Zito, M., Zitoun, R., Funchal, R. Z., Zumerle, G., and Zuniga, J.
Published: 1992

236. Measurement of the average lifetime of B hadrons

Author: Abreu, P. Adam, W. Adami, F. Adye, T. Akesson, T. Alekseev, G.D. Allen, P. Almehed, S. Alvsvaag, S.J. Amaldi, U. Anassontzis, E. Antilogus, P. Apel, W.-D. Apsimon, R.J. Åsman, B. Astier, P. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barate, R. Barbiellini, G. Bardin, D.Y. Baroncelli, A. Barring, O. Bartl, W. Bates, M.J. Bataglia, M. Baubillier, M. Becks, K.-H. Beeston, C.J. Begalli, M. Beilliere, P. Belokopytov, Yu. Beltran, P. Benedic, D. Benlloch, J.M. Berggren, M. Bertrand, D. Bianchi, F. Bilenky, M.S. Billoir, P. Bjarne, J. Bloch, D. Blyth, S. Bocci, V. Bogolubov, P.N. Bolognese, T. Bonapart, M. Bonesini, M. Bonivento, W. Booth, P.S.L. Boratav, M. Borgeaud, P. Borisov, G. Borner, H. Bosio, C. Bostjancic, B. Botner, O. Bouquet, B. Bozzo, M. Braibant, S. Branchini, P. Brand, K.D. Brenner, R.A. Bricman, C. Brown, R.C.A. Brummer, N. Brunet, J.-M. Bugge, L. Burran, T. Burmeister, H. Buytaert, J.A.M.A. Caccia, M. Calvi, M. Camacho Rozas, A.J. Campion, A. Camporesi, T. Canale, V. Cao, F. Carena, F. CArroll, L. Caso, C. Castelli, E. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Cerrito, L. Chan, A. Charpentier, P. Checchia, P. Chelkov, G.A. Chevalier, L. Chliapnikov, M. Chorowicz, V. Cirio, R. Clara, M.P. Collins, P. Contreras, J.L. Contri, R. Cosme, G. Couchot, F. Crawley, H.B. Crennell, D. Crosetti, G. Crozon, M. Cuevas Maestro, J. Czellar, S. Dagoret, S. Dahl-Jensen, E. Dalmagne, B. Dam, M. Damgaard, G. Darbo, G. Daubie, E. Dayncey, P.D. Davenport, M. David, P. De Angelis, A. De Beer, M. De Boeck, H. De Boer, W. De Clercq, C. De Fez Laso, M.D.M. De Groot, N. De Vaissiere, C. De Lotto, B. De Min, A. Defoix, C. Delikaris, D. Delorme, S. Delpierre, P. Demaria, N. DiCiaccio, L. Dijkstra, H. Djama, F. Dolbeau, J. Doll, O. Donszelmann, M. Doraba, K. Dracos, M. Drees, J. Dris, M. Dufour, Y. Dulinski, W. Eek, L.-O. Eerola, P.A.-M. Ekelof, T. Ekspong, G. Elliot Peisert, A. Engel, J.-P. Fassouliotis, D. Feindt, M. Fenyuk, A. Fernandez Alonso, M. Ferrer, A. Filippas, T.A. Firestone, A. Foeth, H. Fokitis, E. Folegati, P. Fontanelli, F. Forbes, K.A.J. Forsbach, H. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Furnival, K. Furstenau, H. Fuster, J. Galeazzi, G. Gamba, D. Garcia, C. Garcia, J. Gaspar, C. Gasparini, U. Gavillet, P. Gazis, E.N. Gerber, J.-P. Giacomelli, P. Glitza, K.-W. Gokieli, R. Golovatyuk, V.M. Gomez Y Cadenas, J.J. Goobar, A. Gopa, G. Gorski, M. Cracco, V. Grant, A. Grard, F. Graziani, E. Gros, M.-H. Grosdidier, G. Gross, E. Grossetete, B. Grosse-Wiesmann, P. Guy, J. Hahn, F. Hahn, M. Haider, S. Hajduk, Z. Hakansson, A. Hallgren, A. Hamacher, K. Hamel De Monchenault, G. Harris, F.J. Heck, B.W. Henkes, T. Herbst, I. Hernandez, J.J. Herquet, P. Herr, H. Hietanen, I. Higgins, C.O. Higon, E. Hilke, H.J. Hodgson, S.D. Hofmokl, T. Holmes, R. Holmgren, S.-O. Holthuizen, D. Honore, P.F. Hooper, J.E. Houlden, M. Hrubec, J. Hulth, P.O. Hultqvist, K. Husson, D. Ioannou, P. Isenhower, D. Iversen, P.-S. Jackson, J.N. Jalocha, P. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Johnson, D. Jonker, M. Jonsson, L. Juillot, P. Kalkanis, G. Kalmus, G. Kapusta, F. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kesteman, J. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, N.J. Klempt, W. Klovning, A. Kluit, P. Koch-Mehrin, A. Koehne, J.H. Koene, B. Kokkinas, P. Kopf, M. Koratzinos, M. Korcyl, K. Korytov, A.V. Kostukhin, V. Kourkoumelis, C. Kreuzberger, T. Krollkowski, J. Kronkvist, I. Krstic, J. Kruener-Marquis, U. Krupinski, W. Kucewicz, W. Kurvinen, K. Lacasta, C. Lambropoulos, C. Lamsa, J.W. Lanceri, L. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Leitner, R. Lemoigne, Y. Lemonne, J. Lenzen, G. Lepeltier, V. Letessier-Selvon, A. Liko, D. Lieb, E. Lillethun, E. Lindgren, J. Lipniacka, A. Lippi, I. Llosa, R. Loerstad, B. Lokajicek, M. Loken, J.G. Lopez Aguera, M.A. Lopez-Fernandez, A. Los, M. Loukas, D. Lounis, A. Lozano, J.J. Lucock, R. Lutz, P. Lyons, L. Maehlum, G. Magnussen, N. Maillard, J. Maltezos, A. Mandl, F. Marco, J. Margoni, M. Marin, J.-C. Markou, A. Marti, S. Mathis, L. Matorras, F. Matteuzzi, C. Matthiae, G. Matveev, M. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. Menichetti, E. Meroni, C. Meyer, W.T. Michelotto, M. Mitaroff, W.A. Mitselmakher, G.V. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Morettini, P. Mueller, H. Murray, W.J. Myatt, G. Naraghi, F. Nau-Korzen, U. Navarria, F.L. Negri, P. Nielsen, B.S. Nijjhar, B. Nikolaenko, V. Obraztsov, V. Olshevski, A.G. Orava, R. Ostankov, A. Ouraou, A. Paganoni, M. Pain, R. Palka, H. Papadopoulou, T. Pape, L. Passeri, A. Pegoraro, M. Perevozchikov, V. Pernicka, M. Perrotta, A. Pierre, F. Pimenta, M. Pingot, O. Pol, M.E. Polok, G. Poropat, P. Privitera, P. Pullia, A. Pyyhtia, J. Radojicic, D. Ragazzi, S. Ratoff, P.N. Read, A.L. Redaelli, N.G. Regler, M. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, M. Ridky, J. Rinaudo, G. Roditi, I. Romero, A. Roncagliolo, I. Ronchese, P. Ronnqvist, C. Rosenberg, E.I. Rossi, U. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann, V. Ruiz, A. Rybicki, K. Saarikko, H. Sacquin, Y. Sajot, G. Salt, J. Sanchez, E. Sanchez, J. Sannino, M. Schaeffer, M. Schael, S. Schneider, H. Schyns, M.A.E. Scuri, F. Segar, A.M. Sekulin, R. Sessa, M. Sette, G. Seufert, R. Shellard, R.C. Siegrist, P. Simonetti, S. Simonetto, F. Sissakian, A.N. Skaali, T.B. Skievling, G. Smadja, G. Smirnov, N. Smith, G.R. Sosnowski, R. Spassoff, T.S. Spiriti, E. Squarcia, S. Staeck, H. Stanescu, C. Stavropoulos, G. Stichelbaut, F. Stocchi, A. Strauss, J. Strub, R. Szczekowski, M. Szeptycka, M. Szymanski, P. Tabarelli, T. Tavernier, S. Theodosiou, G. Tilquin, A. Timmermans, J. Timofeev, V.G. Tkatchev, L.G. Todorov, T. Toet, D.Z. Torassa, E. Tortora, L. Trainor, M.T. Treille, D. Trevisan, U. Trischuk, W. Tristram, G. Troncon, C. Tsirou, A. Tsyganov, E.N. Turala, M. Turchetta, R. Turluer, M.-L. Tuuva, T. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Ueberschaer, B. Ueberschaer, S. Ullaland, O. Urarov, V.A. Valenti, G. Vallazza, E. Valls Ferrer, J.A. Van Apeldoorn, G.W. Van Dam, P. Van Doninck, W.K. Vander Velde, C. Varela, J. Vaz, P. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Vertogradov, L.S. Vibert, L. Vilanova, D. Vitale, L. Vlasov, E.V. Vlassopoulos, S. Vodopyanov, A.S. Vollmer, M. Volponi, S. Voulgaris, G. Voutilainen, M. Vrba, V. Wahlen, H. Walck, C. Waldner, F. Wayne, M. Weilhammer, P. Werner, J. Wetherell, A.M. Wickens, J.H. Wikne, J. Wilkinson, G.R. Williams, W.S.C. Winter, M. Wormald, D. Wormser, G. Woschnagg, K. Yamdagni, N. Yepes, P. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zhang, G. Zimin, N.I. Zito, M. Zitoun, R. Zukanovich Funchal, R. Zumerli, G. Zuniga, J.
Abstract: The average lifetime of B hadrons produced in hadronic Z0 decays has been measured with the DELPHI detector at LEP. The measurement is based on the analysis of the impact parameter distributions of high pt muons and hadrons. The resulting mean B lifetimes are τB=(1.30±0.10±0.08)ps and τB=(1.27±0.04±0.12)ps respectively, giving a combined value of τB=(1.28±0.10)ps. The hadronic sample was also used to measure the partial Z0 width Mathematical expression and gave a value of 0.222-0.031+0.033±0.017. © 1992 Springer-Verlag.
Published: 1992

237. Determination of alpha(s) in second order QCD from hadronicZ decays

Author: Abreu, P., Adam, W., Adami, F., Adye, T., Akesson, T., Alekseev, G. D., Allen, P., Almehed, S., Alvsvaag, S. J., Amaldi, U., Anassontzis, E., Antilogus, P., Apel, W. D., Apsimon, R. J., Åsman, B., Augustin, J. E., Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, G., Bardin, D. Y., Baroncelli, A., Barring, O., Bartl, W., Bates, M. J., Battaglia, M., Baubillier, M., Becks, K. H., Beeston, C. J., Begalli, M., Beilliere, P., Belokopytov, Y. u., Beltran, P., Benedic, D., Benlloch, J. M., Berggren, M., Bertrand, D., Bianchi, F., Bilenky, M. S., Billoir, P., Bjarne, J., Bloch, D., Blyth, S., Bocci, V., Bogolubov, P. N., Bolognese, T., Bonapart, M., Bonesini, M., Bonivento, W., Booth, P. S. L., Borgeaud, P., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Botner, O., Bouquet, B., Bourdarios, C., Bozzo, Marco, Braibant, S., Branchini, P., Brand, K. D., Brenner, R. A., Briand, H., Bricman, C., Brown, R. C. A., Brummer, N., Brunet, J. M., Bugge, L., Buran, T., Burmeister, H., Buytaert, J. A. M. A., Caccia, M., Calvi, M., Camacho Rozas, A. J., Campion, A., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., Caso, Carlo, Castelli, E., Castillo Gimenez, M. V., Cattai, A., Cavallo, F. R., Cerrito, L., Chan, A., Chapkin, M., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, G. A., Chevalier, L., Chliapnikov, P., Chorowicz, V., Cirio, R., Clara, M. P., Collins, P., Contreras, J. L., Contri, Roberto, Cosme, G., Couchot, F., Crawley, H. B., Crennell, D., Crosetti, G., Crozon, M., Cuevas Maestro, J., Czellar, S., Dagoret, S., Dahl Jensen, E., Dalmagne, B., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Dauncey, P. D., Davenport, M., David, P., Silva, W., Defoix, C., Delikaris, D., Delorme, S., Delpierre, P., Demaria, N., Angelis, A., Beer, M., Boeck, H., Boer, W., Clercq, C., Fez Laso, M. D. M., Groot, N., Vaissiere, C., Lotto, B., Min, A., Dijkstra, H., Ciaccio, L., Djama, F., Dolbeau, J., Doll, O., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Dulinski, W., Eek, L. O., Eerola, P. A. M., Ekelof, T., Ekspong, G., Elliot Peisert, A., Engel, J. P., Fassouliotis, D., Feindt, M., Fenyuk, A., Fernandez Alonso, M., Ferrer, A., Filippas, T. A., Firestone, A., Foeth, H., Fokitis, E., Folegati, P., Fontanelli, Flavio, Forbes, K. A. J., Franek, B., Frenkiel, P., Fries, D. C., Frodesen, A. G., Fruhwirth, R., Fulda Quenzer, F., Furnival, K., Furstenau, H., Fuster, J., Galeazzi, G., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, E. N., Gerber, J. P., Giacomelli, P., Gokieli, R., Golovatyuk, V. M., Cadenas, J. J. Gomez Y., Goobar, A., Gopal, G., Gorski, M., Gracco, Valerio, Grant, A., Grard, F., Graziani, E., Grosdidier, G., Gross, E., Grosse Wiesmann, P., Grossetete, B., Guy, J., Hahn, F., Hahn, M., Haider, S., Hajduk, Z., Hakansson, A., Hallgren, A., Hamacher, K., Hamel De Monchenault, G., Harris, F. J., Heck, B. W., Henkes, T., Hernandez, J. J., Herquet, P., Herr, H., Hietanen, I., Higgins, C. O., Higon, E., Hilke, H. J., Hodgson, S. D., Hofmokl, T., Holmes, R., Holmgren, S. O., Holthuizen, D., Honore, P. F., Hooper, J. E., Houlden, M., Hrubec, J., Hulth, P. O., Hultqvist, K., Husson, D., Ioannou, P., Isenhower, D., Iversen, P. S., Jackson, J. N., Jalocha, P., Jarlskog, G., Jarry, P., Jean Marie, B., Johansson, E. K., Johnson, D., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalmus, G., Kapusta, F., Karlsson, M., Katsanevas, S., Katsoufis, E. C., Keranen, R., Kesteman, J., Khomenko, B. A., Khovanski, N. N., King, B., Kjaer, N. J., Klein, H., Klempt, W., Klovning, A., Kluit, P., Koch Mehrin, A., Koehne, J. H., Koene, B., Kokkinias, P., Kopf, M., Koratzinos, M., Korcyl, K., Korytov, A. V., Kostiukhin, V., Kourkoumelis, C., Kramer, P. H., Kreuzberger, T., Krolikowski, J., Kronkvist, I., Krstic, J., Krüner Marquis, U., Krupinski, W., Kucewicz, W., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, J. W., Lanceri, L., Lapin, V., Laugier, J. P., Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Letessier Selvon, A., Lieb, E., Liko, D., Lillethun, E., Lindgren, J., Lindner, R., Lipniacka, A., Lippi, I., Llosa, R., Loerstad, B., Lokajicek, M., Loken, J. G., Lopez Fernandez, A., Lopez Aguera, M. A., Los, M., Loukas, D., Lounis, A., Lozano, J. J., Lutz, P., Lyons, L., Maehlum, G., Magnussen, N., Maillard, J., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, J. C., Markou, A., Maron, T., Marti, S., Mathis, L., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Meola, G., Meroni, C., Meyer, W. T., Michelotto, M., Mitaroff, W. A., Mitselmakher, G. V., Mjoernmark, U., Moa, T., Moeller, R., Mönig, K., Monge, MARIA ROBERTA, Morettini, P., Mueller, H., Murray, W. J., Muryn, B., Myatt, G., Naraghi, F., Navarria, F. L., Negri, P., Nielsen, B. S., Nijjhar, B., Nikolaenko, V., Obraztsov, V., Oesterberg, K., Olshevski, A. G., Orava, R., Ostankov, A., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T., Pape, L., Passeri, A., Pegoraro, M., Pennanen, J., Perevozchikov, V., Pernicka, M., Perrotta, A., Pierre, F., Pimenta, M., Pingot, O., Pol, M. E., Polok, G., Poropat, P., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Ratoff, P. N., Read, A. L., Redaelli, N. G., Regler, M., Reid, D., Renton, P. B., Resvanis, L. K., Richard, F., Richardson, M., Ridky, J., Rinaudo, G., Roditi, I., Romero, A., Roncagliolo, I., Ronchese, P., Ronjin, V., Ronnqvist, C., Rosenberg, E. I., Rossi, U., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmann, V., Ruiz, A., Rybicki, K., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, E., Sanchez, J., Sannino, Mario, Schaeffer, M., Schael, S., Schneider, H., Schyns, M. A. E., Scuri, F., Segar, A. M., Sekulin, R., Sessa, M., Sette, Giuseppe, Seufert, R., Shellard, R. C., Siegrist, P., Simonetti, S., Simonetto, F., Sissakian, A. N., Skaali, T. B., Skjevling, G., Smadja, G., Smith, G. R., Sosnowski, R., Spassoff, T. S., Spiriti, E., Squarcia, Sandro, Staeck, H., Stanescu, C., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Strub, R., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tavernier, S., Tchikilev, O., Theodosiou, G. E., Tilquin, A., Timmermans, J., Timofeev, V. G., Tkatchev, L. G., Todorov, T., Toet, D. Z., Toker, O., Tomaradze, A., Torassa, E., Tortora, L., Trainor, M. T., Treille, D., Trevisan, Umberto, Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, E. N., Turala, M., Turchetta, R., Turluer, M. L., Tuuva, T., Tyapkin, I. A., Tyndel, M., Tzamarias, S., Überschär, B., Überchär, S., Ullaland, O., Uvarov, V., Valenti, G., Vallazza, E., Valls Ferrer, J. A., Velde, C., Apeldoorn, G. W., Dam, P., Dominck, W. K., Varela, J., Vaz, P., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Vertogradov, L. S., Vilanova, D., Vishnevsky, N., Vitale, L., Vlasov, E., Vlassopoulos, S., Vodopyanov, A. S., Vollmer, M., Volponi, S., Voulgaris, G., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wayne, M., Wehr, A., Weierstall, M., Weilhammer, P., Werner, J., Wetherell, A. M., Wickens, J. H., Wikne, J., Wilkinson, G. R., Williams, W. S. C., Winter, M., Wormald, D., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zhang, G., Zimin, N. I., Zito, M., Zitoun, R., Zukanovich Funchal, P., Zumerle, G., and Zuniga, J.
Published: 1992

238. Measurement of the partial width of the Z0 into b anti-b final states using their semileptonic decays

Author: Abreu, P., Adam, W., Adye, T., Agassi, E., Alekseev, G. D., Allen, P., Almehed, S., Alvsvaag, S. J., Amaldi, U., Anassontzis, E., Andreazza, A., Antilogus, P., Apel, W. D., Apsimon, R. J., Asman, B., Augustin, J. E., Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, G., Bardin, D. Y. u., Baroncelli, A., Barring, O., Barrio, J. A., Bartl, W., Bates, M. J., Battaglia, M., Baubillier, M., Becks, K. H., Beeston, C. J., Begalli, M., Beilliere, P., Belokopytov, Y. u., Beltran, P., Benedic, D., Berggren, M., Bertrand, D., Bianchi, Fabrizio, Bilenky, Mikhail S., Pierre, Billoir, Bjarne, J., Bloch, D., Blyth, S., Bocci, V., Bogolyubov, P. N., Bolognese, T., Bonesini, M., Bonivento, W., Booth, P. S. L., Borgeaud, P., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Bosworth, S., Botner, O., Bouquet, B., Bourdarios, C., Bowcock, T. J. V., Bozzo, M., Braibant, S., Branchini, P., Brand, K. D., Brenner, R. A., Briand, H., Bricman, C., Brown, R. C. A., Brummer, N., Brunet, J. M., Bugge, L., Buran, T., Burmeister, H., Buytaert, J. A. M. A., Caccia, M., Calvi, M., Camacho Rozas, A. J., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., Caso, C., Castelli, E., Castillo Gimenez, M. V., Cattai, A., Cavallo, F. R., Cerrito, L., Chabaud, V., Chan, A., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, G. A., Chevalier, L., Chliapnikov, P., Chorowicz, V., Chrin, J. T., Cirio, Roberto, Clara, M. P., Collins, P., Contreras, J. L., Contri, R., Cortina, E., Cosme, G., Couchot, F., Crawley, H. B., Crennell, D., Crosetti, G., Crozon, M., Cuevas Maestro, J., Czellar, S., Dagoret, S., Dahl Jensen, E., D'Almagne, B., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Daum, A., Dauncey, Paul D., Davenport, M., David, P., Da Silva, W., Defoix, C., Delikaris, D., Della Riccia, B. A., Delorme, S., Delpierre, P., Demaria, N., De Angelis, A., De Beer, M., De Boeck, H., de Boer, W., De Clercq, C., De Fez Laso, M. D. M., De Groot, N., de la Vaissiere, C., De Lotto, B., De Min, A., Dijkstra, H., Di Ciaccio, L., Djama, F., Dolbeau, J., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Eek, L. O., Eerola, P. A. M., Ehret, R., Ekelof, T., Ekspong, G., Elliot Peisert, A., Engel, J. P., Fassouliotis, D., Fearnley, T. A., Feindt, M., Fenyuk, A., Fernandez Alonso, M., Ferrer, A., Filippas, T. A., Firestone, A., Foeth, H., Fokitis, E., Fontanelli, F., Forbes, K. A. J., Franek, B., Frenkiel, P., Fries, D. C., Frodesen, A. G., Fruhwirth, R., Fulda Quenzer, F., Furnival, K., Furstenau, H., Fuster, J., Galeazzi, G., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Evangelos, Gazis, Gerber, J. P., Giacomelli, P., Gokieli, R., Golob, B., Golovatyuk, V. M., Cadenas, J. J. Gomez y., Goobar, A., Gopal, G., Gorski, M., Gracco, V., Grant, A., Grard, F., Graziani, E., Grosdidier, G., Gross, E., Grossetete, B., Grosse Wiesmann, P., Gumenyuk, S., Guy, J., Haedinger, U., Hahn, F., Hahn, M., Haider, S., Hajduk, Z., Hakansson, A., Hallgren, A., Hamacher, K., Hamel de Monchenault, G., Hao, W., Harris, F. J., Henkes, T., Hernandez, J. J., Herquet, P., Herr, H., Hessing, T. L., Hietanen, I., Higgins, C. O., Higon, E., Hilke, H. J., Hodgson, S. D., Hofmokl, T., Holmes, R., Holmgren, S. O., Holthuizen, D., Honore, P. F., Hooper, J. E., Houlden, M., Hrubec, J., Hulth, P. O., Hultqvist, K., Ioannou, P., Isenhower, D., Iversen, P. S., John Neil Jackson, Jalocha, P., Jarlskog, G., Jarry, P., Jean Marie, B., Erik Karl Johansson, Johnson, D., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalmus, G., Frederic, Kapusta, Karlsson, M., Karvelas, E., Katsanevas, S., Katsoufis, E. C., Keranen, R., Kesteman, J., Khomenko, B. A., Khovanski, N. N., King, B., Kjaer, N. J., Hansjorg, Klein, Klempt, W., Klovning, A., Kluit, P., Kohne, J. H., Koch Mehrin, A., Koene, B., Kokkinias, P., Kopf, M., Korcyl, K., Korytov, A. V., Kostukhin, V., Kourkoumelis, C., Kouznetsov, O., Paul Heinz Kramer, Krolikowski, J., Kronkvist, I., Krstic, J., Kruner Marquis, U., Krupinski, W., Kulka, K., Kurvinen, K., Carlos, Lacasta, Lambropoulos, C., Lamsa, J. W., Lanceri, L., Lapin, V., Laugier, J. P., Lauhakangas, R., Leder, G., Fabienne, Ledroit, Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Levy, J. M., Elmar, Lieb, Liko, D., Lillethun, E., Lindgren, J., Lindner, R., Lipniacka, A., Lippi, I., Lorstad, B., Lokajicek, M., Loken, J. G., Lopez Aguera, M. A., Lopez Fernandez, A., Los, M., Loukas, D., Lozano, J. J., Lutz, P., Lyons, L., Maehlum, G., Maillard, J., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, J. C., Markou, A., Maron, T., Marti, S., Mathis, L., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Meola, G., Meroni, C., Meyer, W. T., Michelotto, M., Mikulec, I., Mitaroff, W. A., Guenakh, Mitselmakher, Mjornmark, U., Moa, T., Rasmus, Moller, Klaus, Monig, Monge, M. R., Morettini, P., Muller, H., Murray, W. J., Muryn, B., Myatt, G., Naraghi, F., Navarria, F. L., Negri, P., Nielsen, B. S., Nijjhar, B., Nikolaenko, V., Nilsen, P. E. S., Niss, P., Obraztsov, V., Olshevski, A. G., Orava, R., Ostankov, A., Osterberg, K., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T., Pape, L., Passeri, A., Pegoraro, M., Pennanen, J., Perevozchikov, V., Pernicka, M., Perrotta, A., Petrolini, A., Pettersen, T. E., Pierre, F., Pimenta, M., Pingot, O., Pol, M. E., Polok, G., Poropat, P., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Ratoff, P. N., Read, Alexander L., Nicola Giuseppe Redaelli, Regler, M., Reid, D., Renton, P. B., Resvanis, L. K., Richard, F., Richardson, M., Ridky, J., Rinaudo, G., Roditi, I., Romero, Alessandra, Roncagliolo, I., Ronchese, P., Ronnqvist, C., Rosenberg, E. I., Rossi, S., Rossi, U., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmann, V., Ruiz, A., Rybicki, K., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, J., Sannino, M., Schael, S., Schneider, H., Schyns, M. A. E., Sciolla, G., Fabrizio, Scuri, Segar, A. M., Sekulin, R., Sessa, M., Sette, G., Seufert, R., Shellard, R. C., Siccama, I., Siegrist, P., Simonetti, S., Simonetto, F., Sisakian, A. N., Skaali, T. B., Skjevling, G., Smadja, G., Smith, G. R., Sosnowski, R., Spasov, T. S., Spiriti, E., Squarcia, S., Stack, H., Stanescu, C., Stapnes, S., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Straver, J., Strub, R., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tavernier, S., Chikilev, O., Theodosiou, G., Tilquin, A., Jan, Timmermans, Timofeev, V. G., Tkachev, L. G., Todorov, T., Toet, D. Z., Toker, O., Torassa, E., Tortora, L., Trainor, M. T., Treille, D., Trevisan, U., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, E. N., Turala, M., Turluer, M., Tuuva, T., Tyapkin, I. A., Tyndel, M., Tzamarias, S., Uberschar, S., Ullaland, O., Uvarov, V. A., Valenti, G., Vallazza, E., Valls Ferrer, J. A., Vander Velde, C., van Apeldoorn, G. W., Piet van Dam, Walter Van Doninck, Varela, J., Vaz, P., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Vertogradov, L. S., Vilanova, D., Vitale, L., Vlasov, E. V., Vodopianov, A. S., Vollmer, M., Volponi, S., Voulgaris, G., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wayne, M., Wehr, A., Weierstall, M., Weilhammer, P., Werner, J., Wetherell, A. M., Wickens, J. H., Wikne, J., Wilkinson, G. R., Williams, W. S. C., Winter, M., Wormald, D., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zhang, G., Zimin, N. I., Zito, M., Zuberi, R., Zukanovich Funchal, R., Zumerle, G., and Zuniga, J.
Published: 1992

239. A MEASUREMENT OF SIN2-THETA-W FROM THE CHARGE ASYMMETRY OF HADRONIC EVENTS AT THE Z0 PEAK

Author: ABREU, P ADAM, W ADAMI, F ADYE, T AKESSON, T and ALEKSEEV, GD ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, E ANTILOGUS, P APEL, WD APSIMON, RJ and ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY and BARONCELLI, A BARRING, O BARTL, W BATES, MJ BATTAGLIA, M and BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M and BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D and BENLLOCH, JM BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V and BOGOLUBOV, PN BOLOGNESE, T BONAPART, M BONESINI, M and BONIVENTO, W BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H and BOSIO, C BOSTJANCIC, B BOTNER, O BOUQUET, B and BOURDARIOS, C BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA and BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H and BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC and CAMPION, A CAMPORESI, T CANALE, V CAO, F CARENA, F and CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A and CAVALLO, FR CERRITO, L CHAN, A CHARPENTIER, P and CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA and CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R COSME, G and COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M and MAESTRO, JC CZELLAR, S DAGORET, S DAHLJENSEN, E and DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E and DAUNCEY, PD DAVENPORT, M DAVID, P DASILVA, W DEFOIX, C and DELIKARIS, D DELORME, S DELPIERRE, P DEMARIA, N and DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W DECLERCQ, C and LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B and DEMIN, A DIJKSTRA, H DICIACCIO, L DJAMA, F DOLBEAU, J and DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M and DUFOUR, Y DULINSKI, W EEK, LO EEROLA, PAM EKELOF, T and EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D and FEINDT, M FENYUK, A ALONSO, MF FERRER, A FILIPPAS, TA and FIRESTONE, A FOETH, H FOKITIS, E FOLEGATI, P and FONTANELLI, F FORBES, KAJ FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K and FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P and GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R and GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A FRARD, F GRAZIANI, E and GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B and GUMENYUK, S GUY, J HAHN, F HAHN, M HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH and HARRIS, FJ HECK, BW HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ and HODGSON, SD HOFMOKL, T HOLMES, R HOLMGREN, SO and HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J and HULTH, PO HULTQVIST, K HUSSON, D IOANNOU, P and ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P and JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G and KALMUS, G KAPUSTA, F KARLSSON, M KATSANEVAS, S and KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA and KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W and KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B KOKKINIAS, P and KOPF, M KORATZINOS, M KORCYL, K KORYTOV, AV and KOSTIUKHIN, V KOSTRIKOV, M KOURKOUMELIS, C KRAMER, PH and KREUZBERGER, T KROLIKOWSKI, J KRONKVIST, I KRSTIC, J and KRUENERMARQUIS, U KRUPINSKI, W KUCEWICZ, W KURVINEN, K and LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V and LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F and LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LETESSIERSELVON, A LIEB, E LIKO, D LILLETHUN, E and LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LLOSA, R and LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A and AGUERA, MAL LOS, M LOUKAS, D LOUNIS, A LOZANO, JJ and LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MALTEZOS, A and MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A and MARON, T MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C and MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R and MENICHETTI, E MEOLA, G MERONI, C MEYER, WT and MICHELOTTO, M MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U and MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MURRAY, WJ MURYN, B MYATT, G NARAGHI, F and NAVARRIA, FL NEGRI, P NIELSEN, BS NIJJHAR, B and NIKOLAENKO, V OBRAZTSOV, V OESTERBERG, K OLSHEVSKI, AG and ORAVA, R OSTANKOV, A OURAOU, A PAGANONI, M PAIN, R and PALKA, H PAPADOPOULOU, T PAPE, L PASSERI, A PEGORARO, M and PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M PERROTTA, A and PIERRE, F PIMENTA, M PINGOT, O POL, ME POLOK, G and POROPAT, P PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D and RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M and RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I and RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, U and ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V and RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G and SALT, J SANCHEZ, E SANCHEZ, J SANNINO, M SCHAEFFER, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SIEGRIST, P SIMONETTI, S SIMONETTO, F SISSAKIAN, AN and SKAALI, TB SKJEVLING, G SMADJA, G SMIRNOV, N SMITH, GR SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAVROPOULOS, G STICHELBAUT, F and STOCCHI, A STRAUSS, J STRUB, R SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TAVERNIER, S THEODOSIOU, GE and TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG and TODOROV, T TOET, DZ TOKER, O TORASSA, E TORTORA, L and TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M and TURCHETTA, R TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M and TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V and VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C and VANAPELDOORN, GW VANDAM, P VANDONINCK, WK VARELA, J VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F and VERTOGRADOV, LS VILANOVA, D VITALE, L VLASOV, E and VLASSOPOULOS, S VODOPYANOV, AS VOLLMER, M VOLPONI, S and VOULGARIS, G VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C and WALDNER, F WAYNE, M WEHR, A WEIERSTALL, M and WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC WINTER, M WORMALD, D and WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A and ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E and ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R FUNCHAL, RZ and ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment
Abstract: The weak mixing angle has been measured from the charge asymmetry of hadronic events with two different approaches using the DELPHI detector at LEP. Both methods are based on a momentum-weighted charge sum to determine the jet charge in both event hemispheres. In a data sample of 247 300 multihadronic Z0 decays a charge asymmetry of [Q(F)] - [Q(B)] = -0.0076 +/- 0.0012(stat.) +/- O.0005(exp. syst.) +/- 0.0014(frag.) and a raw forward-backward asymmetry of A(FB)raw = 0.0109 +/- 0.0020(stat.) +/- 0.0010(exp.syst.) +/- 0.0017(frag.) have been measured. This result corresponds to a value of sin2-theta(eff) = 0.2345 +/- 0.0030(exp.) +/- 0.0027(frag.) +/- sin2-theta(MSBAR) = 0.2341 +/- 0.0030(exp.) +/- 0.0027(frag.) and to sin2-theta(w) = 1 -m(w)2/m(z)2 = 0.2299 +/- 0.0030(exp.) +/- 0.0027(frag.) +/- 0.0028 (theor.). The experimental error is the quadratic sum of the statistical and the experimental systematic error and the theoretical error originates from a value of m(t) = 130 +/- 40 GeV/c2 and a range of m(H) from 45 GeV/c2 to 100 GeV/c2.
Published: 1992

240. A study of the decays of tau leptons produced on the Z resonance at LEP

Author: Abreu, P. Adam, W. Adye, T. Agasi, E. Alekseev, G.D. Allen, P. Almehed, S. Alvsvaag, S.J. Amaldi, U. Anassontzis, E.G. Andreazza, A. Antilogus, P. Apel, W.-D. Apsimon, R.J. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barate, R. Barbiellini, G. Bardin, D.Y. Baroncelli, A. Barring, O. Barrio, J.A. Bartl, W. Bates, M.J. Battaglia, M. Baubillier, M. Becks, K.-H. Beeston, C.J. Begalli, M. Beilliere, P. Belokopytov, Yu. Beltran, P. Benedic, D. Berggren, M. Bertrand, D. Bianchi, F. Bilenky, M.S. Billoir, P. Bjarne, J. Bloch, D. Blyth, S. Bocci, V. Bogolubov, P.N. Bolognese, T. Bonesini, M. Bonivento, W. Booth, P.S.L. Borgeaud, P. Borisov, G. Borner, H. Bosio, C. Bostjancic, B. Bosworth, S. Botner, O. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Bozzo, M. Braibant, S. Branchini, P. Brand, K.D. Brenner, R.A. Briand, H. Bricman, C. Brown, R.C.A. Brummer, N. Brunet, J.-M. Bugge, L. Buran, T. Burmeister, H. Buytaert, J.A.M.A. Caccia, M. Calvi, M. Camacho Rozas, A.J. Camporesi, T. Canale, V. Cao, F. Carena, F. Carroll, L. Caso, C. Castelli, E. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Cerrito, L. Chabaud, V. Chan, A. Charpentier, Ph. Chaussard, L. Chauveau, J. Checchia, P. Chelkov, G.A. Chevalier, L. Chliapnikov, P. Chorowicz, V. Chrin, J.T.M. Cirio, R. Clara, M.P. Collins, P. Contreras, J.L. Contri, R. Cortina, E. Cosme, G. Couchot, F. Crawley, H.B. Crennell, D. Crosetti, G. Crozon, M. Cuevas Maestro, J. Czellar, S. Dagoret, S. Dahl-Jensen, E. Dalmagne, B. Dam, M. Damgaard, G. Darbo, G. Daubie, E. Daum, A. Dauncey, P.D. Davenport, M. David, P. Da Silva, W. Defoix, C. Delikaris, D. Della Riccia, B.A. Delorme, S. Delpierre, P. Demaria, N. De Angelis, A. De Beer, M. De Boeck, H. De Boer, W. De Clercq, C. De Fez Laso, M.D.M. De Groot, N. De La Vaissiere, C. De Lotto, B. De Min, A. Dijkstra, H. Di Ciaccio, L. Djama, F. Dolbeau, J. Donszelmann, M. Doroba, K. Dracos, M. Drees, J. Dris, M. Dufour, Y. Eek, L.-O. Eerola, P.A.-M. Ehret, R. Ekelof, T. Ekspong, G. Elliot Peisert, A. Engel, J.-P. Fassouliotis, D. Fearnley, T.A. Feindt, M. Fenyuk, A. Fernandez Alonso, M. Ferrer, A. Filippas, T.A. Firestone, A. Foeth, H. Fokitis, E. Fontanelli, F. Forbes, K.A.J. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Furnival, K. Furstenau, H. Fuster, J. Galeazzi, G. Gamba, D. Garcia, C. Garcia, J. Gaspar, C. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gerber, J.-P. Giacomelli, P. Gokieli, R. Bolob, B. Golovatyuk, V.M. Gomez Y Cadenas, J.J. Goobar, A. Gopal, G. Gorski, M. Gracco, V. Grant, A. Grard, F. Graziani, E. Grosadidier, G. Gross, E. Grosse-Wiesmann, P. Grossetete, B. Gumenyuk, S. Guy, J. Haedinger, U. Hahn, F. Hahn, M. Haider, S. Hajduk, Z. Hakansson, A. Hallgren, A. Hamacher, K. Hamel De Monchenault, G. Hao, W. Harris, F.J. Henkes, T. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Hietanen, I. Higgins, C.O. Higon, E. Hilke, H.J. Hodgson, S.D. Hofmokl, T. Holmes, R. Holmgren, S.-O. Holthuizen, D. Honore, P.F. Hooper, J.E. Houlden, M. Hrubec, J. Hulth, P.O. Hultqvist, K. Ioannou, P. Isenhower, D. Iversen, P.-S. Jackson, J.N. Jalocha, P. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Johnson, D. Jonker, M. Jonsson, L. Juillot, P. Kalkanis, G. Kalmus, G. Kapusta, F. Karlsson, M. Karvelas, E. Katsanevas, S. Katsoufis, E.C. Keranen, R. Kesteman, J. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, J.J. Klein, H. Klempt, W. Klovning, A. Kluit, P. Koch-Mehrin, A. Koehne, J.H. Koene, B. Kokkinias, P. Kopf, M. Korcyl, K. Korytov, A.V. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Kramer, P.H. Krolikowski, J. Kronkvist, I. Krstic, J. Kruener-Marquis, U. Krupinski, W. Kulka, K. Kurvinen, K. Lacasta, C. Lambropoulos, C. Lamsa, J.W. Lanceri, L. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Leitner, R. Lemoigne, Y. Lemonne, J. Lenzen, G. Lepeltier, V. Levy, J.M. Lieb, E. Liko, D. Lillethun, E. Lindgren, J. Lindner, R. Lipniacka, A. Lippi, I. Loerstad, B. Lokajicek, M. Loken, J.G. Lopez-Fernandez, A. Lopez Aguera, M.A. Los, M. Loukas, D. Lozano, J.J. Lutz, P. Lyons, L. Maehlum, G. Maillard, J. Maltezos, A. Mandl, F. Marco, J. Margoni, M. Marin, J.-C. Markou, A. Maron, T. Marti, S. Mathis, L. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, M. McCubbin, M. Mc Kay, R. Mc Nulty, R. Meola, G. Meroni, C. Meyer, W.T. Michelotto, M. Mikulec, I. Mitaroff, W.A. Mitselmakher, G.V. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Morettini, P. Mueller, H. Murray, W.J. Muryn, B. Myatt, G. Naraghi, F. Navarria, F.L. Negri, P. Nielsen, B.S. Nijjhar, B. Nikolaenko, V. Nilsen, P.E.S. Niss, P. Obraztsov, V. Olshevski, A.G. Orava, R. Ostankov, A. Osterberg, K. Ouraou, A. Paganoni, M. Pain, R. Palka, H. Papadopoulou, Th.D. Pape, L. Passeri, A. Pegoraro, M. Pennanen, J. Perevozchikov, V. Pernicka, M. Perrotta, A. Petrolini, A. Pettersen, T.E. Pierre, F. Pimenta, M. Pingo, O. Pol, M.E. Polok, G. Poropat, P. Privitera, P. Pullia, A. Radojicic, D. Ragazzi, S. Ratoff, P.N. Read, A.L. Redaelli, N.G. Regler, M. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, M. Ridky, J. Rinaudo, G. Roditi, I. Romero, A. Roncagliolo, I. Ronchese, P. Ronnqvist, C. Rosenberg, E.I. Rossi, S. Rossi, U. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann, V. Ruiz, A. Rybicki, K. Saarikko, H. Sacquin, Y. Sajot, G. Salt, J. Sanchez, J. Sannino, M. Schael, S. Schneider, H. Schyns, M.A.E. Sciolla, G. Scuri, F. Segar, A.M. Sekulin, R. Sessa, M. Sette, G. Seufert, R. Shellard, R.C. Siccama, I. Siegrist, P. Simonetti, S. Simonetti, F. Sisakian, A.N. Skaali, T.B. Skjevling, G. Smadja, G. Smith, G.R. Sosnowski, R. Spassoff, T.S. Spiriti, E. Squarcia, S. Staeck, H. Stanescu, C. Stapnes, S. Stavropoulos, G. Stichelbaut, F. Stocchi, A. Strauss, J. Straver, J. Strub, R. Szczekowski, M. Szeptycka, M. Szymanski, P. Tabarelli, T. Tavernier, S. Tchikilev, O. Theodosiou, G.E. Tilquin, A. Timmermans, J. Timofeev, V.G. Tkatchev, L.G. Todorov, T. Toet, D.Z. Toker, O. Torassa, E. Tortora, L. Trainor, M.T. Treille, D. Trevisan, U. Trischuk, W. Tristram, G. Troncon, C. Tsirou, A. Tsyganov, E.N. Turala, M. Turluer, M.-L. Tuuva, T. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Ueberschaer, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Valls Ferrer, J.A. Vander Velde, C. Van Apeldoorn, G.W. Van Dam, P. Van Doninck, W.K. Varela, J. Vaz, P. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Vertogradov, L.S. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vollmer, M. Volponi, S. Voulgaris, G. Voutilainen, M. Vrba, V. Wahlen, H. Walck, C. Waldner, F. Wayne, M. Wehr, A. Weierstall, M. Weilhammer, P. Werner, J. Wetherell, A.M. Wickens, J.H. Wikne, J. Wilkinson, G.R. Williams, W.S.C. Winter, M. Wormald, D. Wormser, G. Woschnagg, K. Yamdagni, N. Yepes, P. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zhang, G. Zimin, N.I. Zito, M. Zuberi, R. Zukanovich Funchal, R. Zumerle, G. Zuniga, J.
Abstract: From the analysis of a data sample corresponding to an integrated luminosity of 4.63 pb-1 taken during the 1990 run of LEP at centre of mass energies between 88.2 GeV an 94.2 GeV, the tau decays {Mathematical expression} and their charge conjugates have been studied. The following branching ratios have been measured; {Mathematical expression}, {Mathematical expression}, Br(τ- → π- (K-)vτ)=11.9±0.7±0.7%, BR (τ- → ρ- vτ)= 22.4±0.8±1.3%, in good agreement with world averages. The measured electronic and muonic branching ratios lead to a measurement of the strong coupling constant, αs (mτ) = 0.26-0.12+0.09. Extrapolating the αs value from mτ to mZ yields αs (mZ) = 0.109-0.028+0.012. The average polarization Pτ of taus produced in Z → τs τs decays has also been measured using the above decay modes. The weighted mean of the polarizations obtained from the four decay modes is Pτ=-0.24±0.07. This value of Pτ gives, in the improved Born approximation, a ratio between the axial and vector coupling constants of the tau of υτ/aτ = 0.12 ± 0.04, and hence a value of the effective electroweak mixing parameter sin2 θW(mZ2). © 1992 Springer-Verlag.
Published: 1992

241. Determination of $\alpha_{s}$ in second order QCD from hadronic Z decays

Author: Abreu, P., Adam, W., Adami, F., Adye, T., Akesson, T., Alekseev, G. D., Allen, P., Almehed, S., Alvsvaag, S. J., Amaldi, U., Anassontzis, E., Antilogus, P., Apel, W. D., Apsimon, R. J., Asman, B., Astier, P., E Augustin, J., Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Guido Barbiellini, Yu Bardin, D., Baroncelli, A., Barring, O., Bartl, W., Bates, M. J., Battaglia, M., Baubillier, M., Becks, K. H., Beeston, C. J., Begalli, M., Beilliere, P., Yu. Belokopytov, Beltran, P., Benedic, D., Benlloch, J. M., Berggren, M., Bertrand, D., Bianchi, F., Bilenkii, M. S., Billoir, P., Bjarne, J., Bloch, D., Blyth, S., Bocci, V., Bogolyubov, P., Bolognese, T., Bonapart, M., Bonesini, M., Bonivento, W., Booth, P. S. L., Boratav, M., Borgeaud, P., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Botner, O., Bouquet, B., Bourdarios, C., Bozzo, M., Braibant, S., Branchini, P., Brand, K. D., Brenner, R. A., Bricman, C., Brown, R. C. A., Brummer, N., Brunet, J. M., Bugge, L., Buran, T., Burmeister, H., Buytaert, J. A. M. A., Caccia, M., Calvi, M., Camacho Rozas, A. J., Campion, A., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., Caso, C., Castelli, E., Castillo Gimenez, M. V., Cattai, A., Cavallo, F. R., Cerrito, L., Chan, A., Chapkin, M., Charpentier, P., Chaussard, L., Checchia, P., Chelkov, G. A., Chevalier, L., Chliapnikov, P., Chorowicz, V., Cirio, R., Clara, M. P., Collins, P., Contreras, J. L., Contri, R., Cosme, G., Couchot, F., Crawley, H. B., Crennell, D., Crosetti, G., Crozon, M., Cuevas Maestro, J., Czellar, S., Sylvie DAGORET, Dahl-Jensen, E., Almagne, B. D., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Dauncey, P. D., Davenport, M., David, P., Defoix, C., Delikaris, D., Delorme, S., Delpierre, P., Demaria, N., Angelis, A., Beer, M., Boeck, H., Boer, W., Clercq, C., Fez Laso, M. D. M., Groot, N., La Vaissiere, C., Lotto, B., Min, A., Dijkstra, H., Di Ciaccio, L., Djama, F., Dolbeau, J., Doll, O., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Dulinski, W., Eek, L. O., Eerola, P. A., Ekelof, T., Ekspong, G., Elliot Peisert, A., Engel, J. P., Fassouliotis, D., Feindt, M., Fenyuk, A., Fernandez Alonso, M., Ferrer, A., Filippas, T. A., Firestone, A., Foeth, H., Fokitis, E., Folegati, P., Fontanelli, F., Forbes, K. A. J., Forsbach, H., Franek, B., Frenkiel, P., Fries, D. C., Frodesen, A. G., Fruhwirth, R., Fulda-Quenzer, F., Furnival, K., Furstenau, H., Fuster, J., Galeazzi, G., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, E. N., Gerber, J. P., Giacomelli, P., Glitza, K. W., Gokieli, R., Golovatyuk, V. M., Gomez, Y. Cadenas J. J., Goobar, A., Gopal, G., Gorski, M., Gracco, V., Grant, A., Grard, F., Graziani, E., Grosdidier, G., Gross, E., Grossetete, B., Grosse-Wiesmann, P., Guy, J., Hahn, F., Hahn, M., Haider, S., Hajduk, Z., Hakansson, A., Hallgren, A., Hamacher, K., Hamel Monchenault, G., Harris, F. J., Heck, B. W., Henkes, T., Herbst, I., Hernandez, J. J., Herquet, P., Herr, H., Hietanen, I., Higgins, C. O., Higon, E., Hilke, H. J., Hodgson, S. D., Hofmokl, T., Holmes, R., Holmgren, S. O., Holthuizen, D., Honore, P. F., Hooper, J. E., Houlden, M., Hrubec, J., Hulth, P. O., Hultqvist, K., Husson, D., Ioannou, P., Isenhower, D., Iversen, P. S., Jackson, J. N., Jalocha, P., Jarlskog, G., Jarry, P., Jean-Marie, B., Johansson, E. K., Johnson, D., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalmus, G., Kapusta, F., Katsanevas, S., Katsoufis, E. C., Keranen, R., Kesteman, J., Khomenko, B. A., Khovanskii, N. N., King, B., Kjaer, N. J., Klein, H., Klempt, W., Klovning, A., Kluit, P., Koch-Mehrin, A., Kohne, J. H., Koene, B., Kokkinias, P., Kopf, M., Koratzinos, M., Korcyl, K., Korytov, A. V., Kostukhin, V., Kourkoumelis, C., Kreuzberger, T., Krolikowski, J., Kronkvist, I., Krstic, J., Kruner-Marquis, U., Krupinski, W., Kucewicz, W., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, J. W., Lanceri, L., Lapin, V., Laugier, J. P., Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Letessier-Selvon, A., Lieb, E., Liko, D., Lillethun, E., Lindgren, J., Lipniacka, A., Lippi, I., Llosa, R., Lorstad, B., Lokajicek, M., Loken, J., Lopez Aguera, M. A., Lopez-Fernandez, A., Los, M., Loukas, D., Lounis, A., Lozano, J. J., Lutz, P., Lyons, L., Mahlum, G., Magnussen, N., Maillard, J., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, J. C., Markou, A., Marti, S., Mathis, L., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Meola, G., Meroni, C., Meyer, W. T., Michelotto, M., Mitaroff, W. A., Mitselmakher, G., Mjornmark, U., Moa, T., Moller, R., Monig, K., Monge, M. R., Morettini, P., Muller, H., Murray, W. J., Muryn, B., Myatt, G., Naraghi, F., Nau-Korzen, U., Navarria, F. L., Negri, P., Nielsen, B. S., Nijjhar, B., Nikolaenko, V., Obraztsov, V., Oesterberg, K., Olshevski, A. G., Orava, R., Ostankov, A., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T., Pape, L., Passeri, A., Pegoraro, M., Pennanen, J., Perevozchikov, V., Pernicka, M., Perrotta, A., Pierre, F., Pimenta, M., Pingot, O., Pol, M. E., Polok, G., Poropat, P., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Ratoff, P. N., Read, A. L., Redaelli, N. G., Regler, M., Reid, D., Renton, P. B., Resvanis, L. K., Richard, F., Richardson, M., Ridky, J., Rinaudo, G., Roditi, I., Romero, A., Roncagliolo, I., Ronchese, P., Ronzhin, V., Ronnqvist, C., Rosenberg, E. I., Rossi, U., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmann, V., Ruiz, A., Rybicki, K., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, E., Sanchez, J., Sannino, M., Schaeffer, M., Schael, S., Schneider, H., Schyns, M. A. E., Scuri, F., Segar, A. M., Sekulin, R., Sessa, M., Sette, G., Seufert, R., Shellard, R. C., Siegrist, P., Simonetti, S., Simonetto, F., Sisakian, A. N., Skaali, T. B., Skjevling, G., Smadja, G., Smith, G. R., Sosnowski, R., Spassoff, T. S., Spiriti, E., Squarcia, S., Stack, H., Stanescu, C., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Strub, R., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tavernier, S., Chikilev, O., Theodosiou, G., Tilquin, A., Timmermans, J., Timofeev, V. G., Tkachev, L. G., Todorov, T., Toet, D. Z., Toker, O., Tomaradze, A., Torassa, E., Tortora, L., Trainor, M. T., Treille, D., Trevisan, U., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, E. N., Turala, M., Turchetta, R., Turluer, M., Tuuva, T., Tyapkin, I. A., Tyndel, M., Tzamarias, S., Uberschar, B., Uberschar, S., Ullaland, O., Uvarov, V. A., Valenti, G., Vallazza, E., Valls Ferrer, J. A., Apeldoorn, G. W., Dam, P., Doninck, W. K., Vander Velde, C., Varela, J., Vaz, P., Vegni, G., Laurent Ventura, Venus, W., Verbeure, F., Vertogradov, L. S., Vibert, L., Vilanova, D., Vishnevskii, N., Vitale, L., Vlasov, E. V., Vlassopulos, S., Vodopyanov, A. S., Vollmer, M., Volponi, S., Voulgaris, G., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wayne, M., Weilhammer, P., Werner, J., Wetherell, A. M., Wickens, J. H., Wikne, J., Wilkinson, G. R., Williams, W. S. C., Winter, M., Wormald, D., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zhang, G., Zimin, N. I., Zito, M., Zitoun, R., Zukanovich Funchal, R., Zumerle, G., Zuniga, J., Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), DELPHI, Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU)
Subjects: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 1992

242. A Measurement of Sin2-theta-w From the Charge Asymmetry of Hadronic Events At the Z0 Peak

Author: Abreu, P., Adam, W., Adami, F., Adye, T., Akesson, T., Alekseev, G. D., Allen, P., Almehed, S., Alvsvaag, S. J., Amaldi, U., Anassontzis, E., Antilogus, P., Apel, W. D., Apsimon, R. J., Asman, B., Augustin, J. E., Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Barbiellini, G., Bardin, D. Y., Baroncelli, A., Barring, O., Bartl, W., Bates, M. J., Battaglia, M., Baubillier, M., Becks, K. H., Beeston, C. J., Begalli, M., Beilliere, P., Belokopytov, Y., Beltran, P., Benedic, D., Benlloch, J. M., Berggren, M., Bertrand, D., Bianchi, F., Bilenky, M. S., Billoir, P., Bjarne, J., Bloch, D., Blyth, S., Bocci, V., Bogolubov, P. N., Bolognese, T., Bonapart, M., Bonesini, M., Bonivento, W., P. S. L., Borgeaud, P., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Botner, O., Bouquet, B., Bourdarios, C., Bozzo, M., Braibant, S., Branchini, P., Brand, K. D., Brenner, R. A., Briand, H., Bricman, C., R. C. A., Brummer, N., Brunet, J. M., Bugge, L., Buran, T., Burmeister, H., J. A. M., Caccia, M., Calvi, M., A. J. C., Campion, A., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., Caso, C., Castelli, E., M. V. C., Cattai, A., Cavallo, F. R., Cerrito, L., Chan, A., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, G. A., Chevalier, L., Chliapnikov, P., Chorowicz, V., Cirio, Roberto, Clara, M. P., Collins, P., Contreras, J. L., Contri, R., Cosme, G., Couchot, F., Crawley, H. B., Crennell, D., Crosetti, G., Crozon, M., Maestro, J. C., Czellar, S., Dagoret, S., Dahljensen, E., Dalmagne, B., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Dauncey, P. D., Davenport, M., David, P., Dasilva, W., Defoix, C., Delikaris, D., Delorme, S., Delpierre, P., Demaria, N., Deangelis, A., Debeer, M., Deboeck, H., Deboer, W., Declercq, C., M. D. M., Degroot, N., Delavaissiere, C., Delotto, B., Demin, A., Dijkstra, H., Diciaccio, L., Djama, F., Dolbeau, J., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Dulinski, W., Eek, L. O., P. A. M., Ekelof, T., Ekspong, G., Peisert, A. E., Engel, J. P., Fassouliotis, D., Feindt, M., Fenyuk, A., Alonso, M. F., Ferrer, A., Filippas, T. A., Firestone, A., Foeth, H., Fokitis, E., Folegati, P., Fontanelli, F., K. A. J., Franek, B., Frenkiel, P., Fries, D. C., Frodesen, A. G., Fruhwirth, R., Fuldaquenzer, F., Furnival, K., Furstenau, H., Fuster, J., Galeazzi, G., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, E. N., Gerber, J. P., Giacomelli, P., Gokieli, R., Golovatyuk, V. M., J. J. G., Goobar, A., Gopal, G., Gorski, M., Gracco, V., Grant, A., Frard, F., Graziani, E., Grosdidier, G., Gross, E., Grossewiesmann, P., Grossetete, B., Gumenyuk, S., Guy, J., Hahn, F., Hahn, M., Haider, S., Hajduk, Z., Hakansson, A., Hallgren, A., Hamacher, K., Demonchenault, G. H., Harris, F. J., Heck, B. W., Henkes, T., Hernandez, J. J., Herquet, P., Herr, H., Hietanen, I., Higgins, C. O., Higon, E., Hilke, H. J., Hodgson, S. D., Hofmokl, T., Holmes, R., Holmgren, S. O., Holthuizen, D., Honore, P. F., Hooper, J. E., Houlden, M., Hrubec, J., Hulth, P. O., Hultqvist, K., Husson, D., Ioannou, P., Isenhower, D., Iversen, P. S., Jackson, J. N., Jalocha, P., Jarlskog, G., Jarry, P., Jeanmarie, B., Johansson, E. K., Johnson, D., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalmus, G., Kapusta, F., Karlsson, M., Katsanevas, S., Katsoufis, E. C., Keranen, R., Kesteman, J., Khomenko, B. A., Khovanski, N. N., King, B., Kjaer, N. J., Klein, H., Klempt, W., Klovning, A., Kluit, P., Koehne, J. H., Koene, B., Kokkinias, P., Kopf, M., Koratzinos, M., Korcyl, K., Korytov, A. V., Kostiukhin, V., Kostrikov, M., Kourkoumelis, C., Kramer, P. H., Kreuzberger, T., Krolikowski, J., Kronkvist, I., Krstic, J., Kruenermarquis, U., Krupinski, W., Kucewicz, W., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, J. W., Lanceri, L., Lapin, V., Laugier, J. P., Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Letessierselvon, A., Lieb, E., Liko, D., Lillethun, E., Lindgren, J., Lindner, R., Lipniacka, A., Lippi, I., Llosa, R., Loerstad, B., Lokajicek, M., Loken, J. G., Lopezfernandez, A., M. A. L., Los, M., Loukas, D., Lounis, A., Lozano, J. J., Lutz, P., Lyons, L., Maehlum, G., Maillard, J., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, J. C., Markou, A., Maron, T., Marti, S., Mathis, L., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Menichetti, Ezio, Meola, G., Meroni, C., Meyer, W. T., Michelotto, M., Mitaroff, W. A., Mitselmakher, G. V., Mjoernmark, U., Moa, T., Moeller, R., Moenig, K., Monge, M. R., Morettini, P., Mueller, H., Murray, W. J., Muryn, B., Myatt, G., Naraghi, F., Navarria, F. L., Negri, P., Nielsen, B. S., Nijjhar, B., Nikolaenko, V., Obraztsov, V., Oesterberg, K., Olshevski, A. G., Orava, R., Ostankov, A., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T., Pape, L., Passeri, A., Pegoraro, M., Pennanen, J., Perevozchikov, V., Pernicka, M., Perrotta, A., Pierre, F., Pimenta, M., Pingot, O., Pol, M. E., Polok, G., Poropat, P., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Ratoff, P. N., Read, A. L., Redaelli, N. G., Regler, M., Reid, D., Renton, P. B., Resvanis, L. K., Richard, F., Richardson, M., Ridky, J., Rinaudo, G., Roditi, I., Romero, Alessandra, Roncagliolo, I., Ronchese, P., Ronnqvist, C., Rosenberg, E. I., Rossi, U., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmann, V., Ruiz, A., Rybicki, K., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, E., Sanchez, J., Sannino, M., Schaeffer, M., Schael, S., Schneider, H., M. A. E., Scuri, F., Segar, A. M., Sekulin, R., Sessa, M., Sette, G., Seufert, R., Shellard, R. C., Siegrist, P., Simonetti, S., Simonetto, F., Sissakian, A. N., Skaali, T. B., Skjevling, G., Smadja, G., Smirnov, N., Smith, G. R., Sosnowski, R., Spassoff, T. S., Spiriti, E., Squarcia, S., Staeck, H., Stanescu, C., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Strub, R., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tavernier, S., Theodosiou, G. E., Tilquin, A., Timmermans, J., Timofeev, V. G., Tkatchev, L. G., Todorov, T., Toet, D. Z., Toker, O., Torassa, E., Tortora, L., Trainor, M. T., Treille, D., Trevisan, U., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, E. N., Turala, M., Turchetta, R., Turluer, M. L., Tuuva, T., Tyapkin, I. A., Tyndel, M., Tzamarias, S., Ueberschaer, S., Ullaland, O., Uvarov, V., Valenti, G., Vallazza, E., J. A. V., Vandervelde, C., Vanapeldoorn, G. W., Vandam, P., Vandoninck, W. K., Varela, J., Vaz, P., Vegni, G., Ventura, L., Venus, W., Verbeure, F., Vertogradov, L. S., Vilanova, D., Vitale, L., Vlasov, E., Vlassopoulos, S., Vodopyanov, A. S., Vollmer, M., Volponi, S., Voulgaris, G., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wayne, M., Wehr, A., Weierstall, M., Weilhammer, P., Werner, J., Wetherell, A. M., Wickens, J. H., Wikne, J., Wilkinson, G. R., W. S. C., Winter, M., Wormald, D., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zhang, G., Zimin, N. I., Zito, M., Zitoun, R., Funchal, R. Z., Zumerle, G., Zuniga, J., Delphi, Collaboration, Abreu, P., Adam, W., Canale, Vincenzo, Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), DELPHI, Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)
Subjects: Nuclear and High Energy Physics, Particle physics, E+E ANNIHILATION, LUND MONTE-CARLO, Electron–positron annihilation, media_common.quotation_subject, Hadron, Jet (particle physics), collective information systems, 01 natural sciences, Asymmetry, JET FRAGMENTATION, Nuclear physics, PHYSICS, 0103 physical sciences, personal information system, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Z-DECAYS, 010306 general physics, media_common, Physics, Range (particle radiation), 010308 nuclear & particles physics, Weinberg angle, Charge (physics), information science, Quadratic Gauss sum, information pratices, Physique des particules élémentaires, High Energy Physics::Experiment, Física nuclear, Particle Physics - Experiment
Abstract: View references (24)The weak mixing angle has been measured from the charge asymmetry of hadronic events with two different approaches using the DELPHI detector at LEP. Both methods are based on a momentum-weighted charge sum to determine the jet charge in both event hemispheres. In a data sample of 247 300 multihadronic Z0 decays a charge asymmetry of 〈QF〉 - 〈QB〉 = -0.0076±0.0012(stat.)±0.0005(exp. syst.)±0.0014(frag.) and a raw forward-backward asymmetry of Araw FB = -0.0109±0.0020(stat.)±0.0010(exp. syst.)±0.0017(frag.) have been measured. This result corresponds to a value of sinθeff=0.2345±0.0030(exp.)±0.0027(frag.) ,sin2θMS=0.2341±0.0030(exp.)±0. 0027(frag.) and to sin2θW=1-m2 W/m2 Z=0.2299± 0.0030(exp.)±0.0027(frag.)±0.0028(theor.). The experimental error is the quadratic sum of the statistical and the experimental systematic error and the theoretical error originates from a value of mt=130±40 GeV/c2 and a range of mH from 45 GeV/c2 to 1000 GeV/c2., 0, info:eu-repo/semantics/published
Published: 1992

243. Study of Orientation of 3-jet Events In Z(0) Hadronic Decays Using the Delphi Detector

Author: Abreu, P, Adam, W, Adami, F, Adye, T, Akesson, T, Alekseev, Gd, Allen, P, Almehed, S, Alted, F, Alvsvaag, Sj, Amaldi, U, Anassontzis, E, Antilogus, P, Apel, Wd, Apsimon, Rj, Asman, B, Astier, P, Augustin, Je, Augustinus, A, Baillon, P, Bambade, P, Barao, F, Barbiellini, G, Bardin, Dy, Baroncelli, A, Barring, O, Bartl, W, Battaglia, M, Bates, Mj, Baubillier, M, Becks, Kh, Beeston, Cj, Begalli, M, Beilliere, P, Belokopytov, Y, Belous, K, Beltran, P, Benedic, D, Benlloch, Jm, Berggren, M, Bertrand, D, Biagi, S, Bianchi, F, Bibby, Jh, Bilenky, Ms, Billoir, P, Bjarne, J, Bloch, D, Blyth, S, Bogolubov, Pn, Bolognese, T, Bonapart, M, Bonesini, M, Bonivento, W, Booth, Psl, Boratav, M, Borgeaud, P, Borner, H, Bosio, C, Botner, O, Bouquet, B, Bozzo, M, Braibant, S, Branchini, P, Brand, Kd, Brenner, Ra, Bricman, C, Brown, Rca, Brummer, N, Brunet, Jm, Bugge, L, Buran, T, Burmeister, H, Buytaert, Jama, Caccia, M, Calvi, M, Rozas, Ajc, Campagne, Je, Campion, A, Camporesi, T, Canale, V, Cao, F, Carroll, L, Caso, C, Castelli, E, Gimenez, Mvc, Cattai, A, Cavallo, Fr, Cerrito, L, Chapkin, M, Charpentier, P, Checchia, P, Chelkov, Ga, Chevalier, L, Chliapnikov, P, Chorowicz, V, Cirio, R, Clara, Mp, Collins, P, Contreras, Jl, Contri, R, Cosme, G, Couchot, F, Crawley, Hb, Crennell, D, Crosetti, G, Crosland, N, Crozon, M, Maestro, Jc, Czellar, S, Dagoret, S, Dahljensen, E, Dalmagne, B, Dam, M, Damgaard, G, Darbo, G, Daubie, E, Dauncey, Pd, Davenport, M, David, P, Deangelis, A, Debeer, M, Deboeck, H, Deboer, W, Declercq, C, Laso, Mdmd, Degroot, N, Delavaissiere, C, DE LOTTO, Barbara, Defoix, C, Delikaris, D, Delorme, S, Delpierre, P, Demaria, N, Demin, A, Derkaoui, J, Diciaccio, L, Dijkstra, H, Djama, F, Dolbeau, J, Donszelmann, M, Doroba, K, Dracos, M, Drees, J, Dris, M, Dulinski, W, Dzhelyadin, R, Eek, Lo, Eerola, Pam, Ekelof, T, Ekspong, G, Peisert, Ae, Engel, Jp, Falaleev, V, Fassouliotis, D, Alonso, Mf, Ferrer, A, Filippas, Ta, Firestone, A, Foeth, H, Fokitis, E, Folegati, P, Fontanelli, F, Forsbach, H, Franek, B, Fransson, Ke, Frenkiel, P, Fries, Dc, Frodesen, Ag, Fruhwirth, R, Fuldaquenzer, F, Furnival, K, Furstenau, H, Fuster, J, Gago, Jm, Galeazzi, G, Gamba, D, Garcia, C, Garcia, J, Gasparini, U, Gavillet, P, Gazis, En, Gerber, Jp, Giacomelli, P, Glitza, Kw, Gokieli, R, Golovatyuk, Vm, Cadenas, Jjgy, Goobar, A, Gopal, G, Gorski, M, Gracco, V, Grant, A, Grard, F, Graziani, E, Gros, Mh, Grosdidier, G, Grossetete, B, Guy, J, Hahn, F, Hahn, M, Haider, S, Hajduk, Z, Hakansson, A, Hallgren, A, Hamacher, K, Demonchenault, Gh, Harris, Fj, Heck, Bw, Herbst, I, Hernandez, Jj, Herquet, P, Herr, H, Hietanen, I, Higon, E, Hilke, Hj, Hodgson, Sd, Hofmokl, T, Holmes, R, Holmgren, So, Holthuizen, D, Honore, Pf, Hooper, Je, Houlden, M, Hrubec, J, Hulth, Po, Hultqvist, K, Husson, D, Hyams, Bd, Ioannou, P, Isenhower, D, Iversen, Ps, Jackson, Jn, Jalocha, P, Jarlskog, G, Jarry, P, Jeanmarie, B, Johansson, Ek, Johnson, D, Jonker, M, Jonsson, L, Juillot, P, Kalkanis, G, Kalmus, G, Kantardjian, G, Kapusta, F, Katsanevas, S, Katsoufis, Ec, Keranen, R, Kesteman, J, Khomenko, Ba, Khovanski, Nn, King, B, Kjaer, Nj, Klein, H, Klempt, W, Kliutchnikov, G, Klovning, A, Kluit, P, Koehne, Jh, Koene, B, Kokkinias, P, Kopf, M, Koratzinos, M, Korcyl, K, Korytov, Av, Korzen, B, Kourkoumelis, C, Kreuzberger, T, Krolikowski, J, Krstic, J, Kruenermarquis, U, Krupinski, W, Kucewicz, W, Kurvinen, K, Lacasta, C, Lambropoulos, C, Lamsa, Jw, Lanceri, L, Lapin, V, Laugier, Jp, Lauhakangas, R, Leder, G, Ledroit, F, Lemonne, J, Lenzen, G, Lepeltier, V, Letessierselvon, A, Liko, D, Lieb, E, Lillethun, E, Lindgren, J, Lipniacka, A, Lippi, I, Llosa, R, Loerstad, B, Lokajicek, M, Loken, Jg, Aguera, Mal, Lopezfernandez, A, Los, M, Loukas, D, Lounis, A, Lozano, Jj, Lucock, R, Lutz, P, Lyons, L, Maehlum, G, Maillard, J, Maltezos, A, Maltezos, S, Mandl, F, Marco, J, Margoni, M, Marin, Jc, Markou, A, Marti, S, Mathis, L, Matorras, F, Matteuzzi, C, Matthiae, G, Matveev, M, Mazzucato, M, Mccubbin, M, Mckay, R, Mcnulty, R, Menichetti, E, Meroni, C, Meyer, Wt, Michelotto, M, Mitaroff, Wa, Mitselmakher, Gv, Mjoernmark, U, Moa, T, Moeller, R, Moenig, K, Monge, Mr, Morettini, P, Mueller, H, Muller, H, Murray, Wj, Myatt, G, Naraghi, F, Naukorzen, U, Navarria, Fl, Negri, P, Nielsen, Bs, Nijjhar, B, Nikolaenko, V, Obraztsov, V, Olshevski, Ag, Orava, R, Ostankov, A, Ouraou, A, Pain, R, Palka, H, Papadopoulou, T, Pape, L, Passeri, A, Pegoraro, M, Perevozchikov, V, Pernicka, M, Perrotta, A, Pierre, F, Pimenta, M, Pingot, O, Pinsent, A, Pol, Me, Polok, G, Poropat, P, Privitera, P, Pullia, A, Pyyhtia, J, Radojicic, D, Ragazzi, S, Range, Wh, Ratoff, Pn, Read, Al, Redaelli, Ng, Regler, M, Reid, D, Renton, Pb, Resvanis, Lk, Richard, F, Richardson, M, Ridky, J, Rinaudo, G, Roditi, I, Romero, A, Roncagliolo, I, Ronchese, P, Ronnqvist, C, Rosenberg, Ei, Rossi, U, Rosso, E, Roudeau, P, Rovelli, T, Ruckstuhl, W, Ruhlmann, V, Ruiz, A, Rybicki, K, Saarikko, H, Sacquin, Y, Salt, J, Sanchez, E, Sanchez, J, Sannino, M, Schaeffer, M, Schael, S, Schneider, H, Scuri, Fabrizio, Segar, Am, Sekulin, R, Sessa, M, Sette, G, Seufert, R, Shellard, Rc, Siegrist, P, Simonetti, S, Simonetto, F, Sissakian, An, Skaali, Tb, Skjevling, G, Smadja, G, Smith, Gr, Sosnowski, R, Spassoff, Ts, Spiriti, E, Squarcia, S, Staeck, H, Stanescu, C, Stavropoulos, G, Stichelbaut, F, Stocchi, A, Strauss, J, Strub, R, Stubenrauch, Cj, Szczekowski, M, Szeptycka, M, Szymanski, P, Tabarelli, T, Tavernier, S, Theodosiou, Ge, Tilquin, A, Timmermans, J, Timofeev, Vg, Tkatchev, Lg, Todorov, T, Toet, Dz, Tortora, L, Trainor, Mt, Treille, D, Trevisan, U, Trischuk, W, Tristram, G, Troncon, C, Tsirou, A, Tsyganov, En, Turala, M, Turchetta, R, Turluer, Ml, Tuuva, T, Tyapkin, Ia, Tyndel, M, Tzamarias, S, Ueberschaer, B, Ueberschaer, S, Ullaland, O, Uvarov, Va, Valenti, G, Vallazza, E, Ferrer, Jav, Vanapeldoorn, Gw, Vandam, P, Vandoninck, Wk, Vaneijndhoven, N, Vandervelde, C, Varela, J, Vaz, P, Vegni, G, Velasco, J, Ventura, L, Venus, W, Verbeure, F, Vertogradov, Ls, Vibert, L, Vilanova, D, Vitale, L, Vlasov, Ev, Vodopyanov, As, Vollmer, M, Volponi, S, Voulgaris, G, Voutilainen, M, Vrba, V, Wahlen, H, Walck, C, Waldner, F, Wayne, M, Weilhammer, P, Werner, J, Wetherell, Am, Wickens, Jh, Wikne, J, Wilkinson, Gr, Williams, Wsc, Winter, M, Wormald, D, Wormser, G, Woschnagg, K, Yamdagni, N, Yepes, P, Zaitsev, A, Zalewska, A, Zalewski, P, Zevgolatakos, E, Zhang, G, Zimin, Ni, Zito, M, Zitoun, R, Funchal, Rz, Zumerle, G, and Zuniga, J.
Subjects: PHYSICS, PETRA, LUND MONTE-CARLO, High Energy Physics::Lattice, High Energy Physics::Phenomenology, High Energy Physics::Experiment, Nuclear Experiment, Particle Physics, E+E-ANNIHILATION, JET FRAGMENTATION
Abstract: The study of the orientation of three-jet events from e+e-→Z0→ multi-hadrons is presented, in particular the polar angle distributions of the thrust axis and of the normal to the three-jet plane, and the azimuthal correlations between the hadron plane and the one defined by the beam and thrust axes. The data are compared with results at lower energy and with QCD predictions. Good agreement with QCD predictions is observed. The scalar gluon theory is excluded by the data.
Published: 1992

244. Electroweak parameters of the Z$^0$ resonance and the standard model

Author: DECAMP, D, Deschizeaux, B, Goy, C, Lees, JP, Minard, MN, Alemany, R, Crespo, JM, Delfino, M, Fernandez, E, Gaitan, V, Garrido, LI, Mir, LLM, Pacheco, A, Catanesi, MG, Creanza, D, de Palma, M, Farilla, A, Iaselli, G, Maggi, G, Maggi, M, Natali, S, Nuzzo, S, Quattromini, M, Ranieri, A, Raso, G, Romano, F, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Zito, G, Gao, Y, Hu, H, Huang, D, Huang, X, Lin, J, Lou, J, Qiao, C, Ruan, T, Wang, T, Xie, Y, Xu, D, Xu, R, Zhang, J, Zhao, W, Atwood, WB, Bauerdick, LAT, Bird, F, Blucher, E, Bonvicini, G, Bossi, F, Boudreau, J, Brown, D, Burnett, TH, Drevermann, H, Forty, RW, Grab, C, Hagelberg, R, Haywood, S, Hilgart, J, Jost, B, Kasemann, M, Knobloch, J, Lacourt, A, Lancon, E, Lehraus, I, Lohse, T, Lusiani, A, Marchioro, A, Martinez, M, Mato, P, Menary, S, Minten, A, Miotto, A, Miquel, R, Moser, HG, Nash, J, Palazzi, P, Ranjard, F, Redlinger, G, Roth, A, Rothberg, J, Rotscheidt, H, Saich, M, St Denis, R, Schlatter, D, Takashima, M, Talby, M, Tejessy, W, Wachsmuth, H, Wasserbaech, S, Wheeler, S, Wiedenmann, W, Witzeling, W, Wotschack, J, Ajaltouni, Z, Bardadin-Otwinowska, M, El Fellous, R, Falvard, A, Gay, P, Harvey, J, Henrard, P, Jousset, J, Michel, B, Montret, JC, Pallin, D, Perret, P, Proriol, J, Prulhiere, F, Stimpfl, G, Hansen, JD, Hansen, JR, Hansen, PH, Mollerud, R, Nilsson, BS, Efthymiopoulos, I, Simopoulou, E, Vayaki, A, Badier, J, Blondel, A, Bonneaud, G, Bourotte, J, Braems, F, Brient, JC, Fouque, G, Gamess, A, Guirlet, R, Orteu, S, Rosowsky, A, Rouge, A, Rumpf, M, Tanaka, R, Videau, H, Candlin, DJ, Veitch, E, Parrini, G, Corden, M, Georgiopoulos, C, Ikeda, M, Lannutti, J, Levinthal, D, Mermikides, M, Sawyer, L, Antonelli, A, Baldini, R, Bencivenni, G, Bologna, G, Campana, P, Capon, G, Cerutti, F, Chiarella, V, D'Ettorre-Piazzoli, B, Felici, G, Laurelli, P, Mannocchi, G, Murtas, F, Murtas, GP, Nicoletti, G, Passalacqua, L, Pepe-Altarelli, M, Picchi, P, Zografou, P, Altoon, B, Boyle, O, Halley, AW, ten Have, I, Hearns, JL, Lynch, JG, Morton, WT, Raine, C, Scarr, JM, Smith, K, Thompson, AS, Turnbull, RM, Brandl, B, Braun, O, Geiges, R, Geweniger, C, Hanke, P, Hepp, V, Kluge, EE, Maumary, Y, Putzer, A, Rensch, B, Stahl, A, Tittel, K, Wunsch, M, Belk, AT, Beuselinck, R, Binnie, DM, Cameron, W, Cattaneo, M, Dornan, PJ, Dugeay, S, Greene, AM, Hassard, JF, Lieske, NM, Patton, SJ, Payne, DG, Phillips, MJ, Sedgbeer, JK, Taylor, G, Tomalin, IR, Wright, AG, Girtler, P, Kuhn, D, Rudolph, G, Bowdery, CK, Brodbeck, TJ, Finch, AJ, Foster, F, Hughes, G, Keemer, NR, Nuttall, M, Patel, A, Rowlingson, BS, Sloan, T, Snow, SW, Whelan, EP, Barczewski, T, Kleinknecht, K, Raab, J, Renk, B, Roehn, S, Sander, HG, Schmelling, M, Schmidt, H, Steeg, F, Walther, SM, Wolf, B, Albanese, JP, Aubert, JJ, Benchouk, C, Bernard, V, Bonissent, A, Courvoisier, D, Etienne, F, Papalexiou, S, Payre, P, Pietrzyk, B, Qian, Z, Becket, H, Blum, W, Cattaneo, P, Cowan, G, Dehning, B, Dietl, H, Dydak, F, Fernandez-Bosman, M, Hansl-Kozanecka, T, Jahn, A, Kozanecki, W, Lange, E, Lauber, J, Lutjens, G, Lutz, G, Manner, W, Pan, Y, Richter, R, Schroder, J, Schwarz, AS, Settles, R, Stierlin, U, Thomas, J, Wolf, G, Bertin, V, Boucrot, J, Callot, O, Chen, X, Cordier, A, Davier, M, Ganis, G, Grivaz, JF, Heusse, P, Janot, P, Kim, DW, Le Diberder, F, Lefrancois, J, Lutz, AM, Veillet, JJ, Videau, I, Zhang, Z, Zomer, F, Abbaneo, D, Amendolia, SR, Bagliesi, G, Batignani, G, Bosisio, L, Bottigli, U, Bradaschia, C, Carpinelli, M, Ciocci, MA, Dell'Orso, R, Ferrante, I, Fidecaro, F, Foa, L, Focardi, E, Forti, F, Gatto, C, Giassi, A, Giorgi, MA, Ligabue, F, Mannelli, EB, Marrocchesi, PS, Messineo, A, Moneta, L, Palla, F, Sanguinetti, G, Steinberger, J, Tenchini, R, Tonelli, G, Triggiani, G, Vannini, C, Venturi, A, Verdini, PG, Walsh, J, Carter, JM, Green, MG, March, PV, Medcalf, T, Quazi, IS, Strong, JA, Thomas, RM, West, LR, Wildish, T, Botterill, DR, Clift, RW, Edgecock, TR, Edwards, M, Fisher, SM, Jones, TJ, Norton, PR, Salmon, DP, Thompson, JC, Bloch-Devaux, B, Colas, P, Klopfenstein, C, Locci, E, Loucatos, S, Monnier, E, Perez, P, Perlas, JA, Pettier, F, Rander, J, Renardy, JF, Roussarie, A, Schuller, JP, Schwindling, J, Vallage, B, Ashman, JG, Booth, CN, Buttar, C, Carney, R, Cartwright, S, Combley, F, Dinsdale, M, Dogru, M, Hatfield, F, Martin, J, Parker, D, Reeves, P, Thomson, LF, Barberio, E, Brandt, S, Burkhardt, H, Grupen, C, Meinhard, H, Mirabito, L, Schaifer, U, Seywerd, H, Apollinari, G, Giannini, G, Gobbo, B, Liello, F, Ragusa, F, Rolandi, L, Stiegler, U, Bellantoni, L, Cinabro, D, Conway, JS, Cowen, DF, Feng, Z, Ferguson, DPS, Gao, YS, Grahl, J, Harton, JL, Jacobsen, JE, Jared, RC, Johnson, RP, Le Claire, BW, Pan, YB, Pater, JR, Saadi, Y, Sharma, V, Shi, ZH, Tang, YH, Walsh, AM, Wear, JA, Weber, FV, Whitney, MH, Wu, SL, Zobernig, G, ABREU, P, Adam, W, Adami, F, Adye, T, Akesson, T, Alekseev, GD, Allen, P, Almehed, S, Alted, F, Alvsvaag, SJ, Amaldi, U, Anassontzis, EG, Antilogus, P, Apel, WD, Asman, B, Astier, P, Augustin, JE, Augustinus, A, Baillon, P, Bambade, P, Barao, F, Barbiellini, G, Bardin, DY, Baroncelli, A, Barring, O, Bartl, W, Battaglia, M, Bates, MJ, Baubillier, M, Becks, KH, Beeston, CJ, Begalli, M, Beilliere, P, Belokopytov, YA, Beltran, P, Benedic, D, Benlloch, JM, Berggren, M, Bertrand, D, Biagi, SF, Bianchi, F, Bibby, JH, Bilenky, SM, Billoir, P, Bjarne, J, Bloch, D, Blyth, S, Bogolubov, PN, Bolognese, T, Bonapart, M, Bonesini, M, Bonivento, W, Booth, PSL, Boratav, M, Borgeaud, P, Borisov, G, Borner, H, Bosio, C, Botner, O, Bouquet, B, Bozzo, M, Braibant, S, Branchini, P, Brand, KD, Brenner, RA, Bricman, C, Brown, RCA, Brummer, N, Brunet, JM, Bugge, L, Buran, T, Burmeister, H, Buytaert, J, Caccia, M, Calvi, M, Camacho-Rozas, AJ, Campagne, JE, Campion, A, Camporesi, T, Canale, V, Cao, F, Carroll, L, Caso, C, Castelli, E, Castillo-Gimenez, MV, Cattai, A, Cavallo, FR, Cerrito, L, Chapkin, MM, Charpentier, P, Checchia, P, Chelkov, GA, Chevalier, L, 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NI, Geich-Gimbel, C, Gensler, MW, Gentit, FX, Giacomelli, G, Gibson, V, Gibson, WR, Gilles, JD, Goldberg, J, Goodrick, MJ, Gorn, W, Grandi, C, Gross, E, Hagemann, J, Hanson, GG, Hansroul, M, Hargrove, CK, Harrison, PF, Hart, J, Hattersley, PM, Hauschild, M, Hawkes, CM, Heflin, E, Hemingway, RJ, Heuer, RD, Hill, JC, Hillier, SJ, Hinshaw, DA, Ho, C, Hobbs, JD, Hobson, RR, Hochman, D, Holl, B, Homer, RJ, Hou, SR, Howarth, CP, Humbert, R, Hughes-Jones, RE, Igo-Kemenes, P, Ihssen, H, Imrie, DC, Janissen, L, Jawahery, A, Jeffreys, PW, Jeremie, H, Jimack, M, Jobes, M, Jones, RWL, Jovanovic, P, Karlen, D, Kawagoe, K, Kawamoto, T, Keeler, RK, Kellogg, RG, Kennedy, BW, Kleinwort, C, Klem, DE, Kobayashi, T, Kokott, TP, Komamiva, S, Koepke, L, Kowalewski, R, Kreutzmann, H, Von Krogh, J, Kroll, J, Kuwano, M, Kyberd, P, Lafferty, GD, Lamarche, F, Larson, WJ, Lavter, JG, Le Du, P, Leblanc, P, Lee, AM, Lehto, MH, Lellouch, D, Lennert, P, Leroy, C, Lessard, ML, Levegruen, S, Levinson, L, Lloyd, SL, Loebinger, FK, Lorah, JM, Lorazo, B, Losty, MJ, Lou, XC, Ludwig, J, Mannelli, M, Marcellini, S, Maringer, G, Martin, AJ, Martin, JP, Mashimo, T, Maettig, P, Maur, U, McMahon, TJ, McNutt, JR, Meijers, F, Menszner, D, Merritt, FS, Mes, H, Michelini, A, Middleton, RP, Mikenberg, G, Mildenberger, J, Miller, DJ, Milstene, C, Mir, R, Mohr, W, Moisan, C, Montanari, A, Mori, T, Moss, MW, Mouthuy, T, Murphy, PG, Nellen, B, Nguyen, HH, Nozaki, M, O'Neale, SW, O'Neill, BP, Oakham, FG, Odorici, F, Ogg, M, Ogren, HO, Oh, JH, Oram, CJ, Oreglia, MJ, Orito, S, Pansart, JP, Panzer-Steindel, B, Paschievici, P, Patrick, GN, Pawley, SJ, Pfister, P, Pilcher, JE, Pinfold, JL, Plane, DE, Poffenberger, PR, Poli, B, Pouladdej, A, Prebys, E, Pritchard, W, Przysiezniak, H, Quast, Q, Redmond, MW, Rees, DL, Riles, K, Robins, SA, Robinson, D, Rollnik, A, Roney, JM, Rossberg, S, Rossi, AM, Routenburg, P, Runge, K, Runolfsson, O, Rust, DR, Sanghera, S, Sasaki, M, Schaile, AD, Schappert, W, Scharff-Hansen, P, Schenk, P, Von der Schmitt, H, Schreiber, S, Schwarz, J, Scott, WG, Settles, M, Shen, BC, Sherwood, P, Shypit, R, Simon, A, Singh, P, Siroli, GP, Skuja, A, Smith, AM, Smith, TJ, Snow, GA, Sobie, RJ, Springer, RW, Sproston, M, Stephens, K, Stier, HE, Strom, D, Takeda, H, Takeshita, T, Taras, P, Tarem, S, Teixeira-Dias, P, Thackray, NJ, Tsukamoto, T, Turner, MF, Tysarczyk-Niemeyer, G, Van den plas, D, Van Kooten, R, VanDalen, GJ, Vasseur, G, Virtue, CJ, Wagner, A, Wahl, C, Walker, JP, Ward, CP, Ward, DR, Watkins, PM, Watson, AT, Watson, NK, Weber, M, Weisz, S, Wells, PS, Wermes, N, Weymann, M, Whalley, MA, Wilson, GW, Wilson, JA, Wingerter, I, Winterer, VH, Wood, NC, Wotten, SA, Wyatt, TR, Yaari, R, Yang, Y, Yekutieli, G, Zacharov, I, Zeuner, W, Zorn, GT, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), ALEPH, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Bourquin, Maurice, Burger, William, Duchesneau, Dominique Robert, Extermann, Pierre, Field, John, Forconi, Gilles Raymond, Goujon, Didier, Hoorani, Hafeez-Ur-Rehman, Kienzle, Maria-Novella, Perrier, Jacques, Produit, Nicolas, Wenninger, Joerg Horst, Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU)
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Wish, media, Context (language use), Temporality, ddc:500.2, temporalities, 01 natural sciences, elderly, Epistemology, Temporalities, Appropriation, Expression (architecture), 0103 physical sciences, Selection (linguistics), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Media system dependency theory, 010306 general physics, uses, Particle Physics - Experiment, time
Abstract: Media temporalities of the elderly : evolutions in stability This article shows the context of analysis and the first results of a research on media temporalities of the elderly. Several works have finely analysed the diversity of the media practices and studied meanings of media uses. I wish to continue these analyses by insisting on the evolutionary and dynamic aspect of the practices and temporalities of users having expanded, enhanced, so called "interactive" radio and especially television programming. A priori, the elderly, upon retirement, have a "full-time free time". Their media practices seem strongly influenced by their first experiments ; the appropriation of the various peripheral accessories which gradually came with the media, to the latest digital ones, seems to reinforce their habits of watching television. Their representations and relations with times and media are very far away from the image of television like omnipresent media or "devourer of time". Rather, their media practices are to be understood like a temporality of the occupation, according to the expression of Gerard Derèze, characterized by interest and utility. A particular glance at the users who do not carry out a systematic selection of the programs, accepting the unforeseen, highlights an approach of media and time that allow "useful encounter" which I would qualify in a first stage by : "chance and encounter" and "random and the following". The few points presented here make me assume that the global relation of the autonomous elderly persons to the media can evolve when confronted to their new temporal framework and the new program offer, whereas their representations and use of the media remain quite stable.
Published: 1992

245. CLASSIFICATION OF THE HADRONIC DECAYS OF THE Z0 INTO B-QUARK AND C-QUARK PAIRS USING A NEURAL NETWORK

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSEEV, GD and ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U and ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P APEL, WD and APSIMON, RJ ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G and BARDIN, DY BARKER, G BARONCELLI, A BARRING, O BARRIO, JA and BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y and BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M and BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J and BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORGEAUD, P and BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S and BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV and BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA and BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA and CACCIA, M CALVI, M ROZAS, AJC CAMPORESI, T CANALE, V and CAO, F CARENA, F CARROLL, L CASO, C GIMENEZ, MVC and CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A and CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CHRIN, JTM CIUCHINI, M CLARA, MP COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COSMO, G COUCHOT, F and CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M and MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M and DAMGAARD, G DARBO, G DAUBIE, E DAUM, A DAUNCEY, PD and DAVENPORT, M DAVID, P DASILVA, W DEFOIX, C and DELIKARIS, D DELORME, S DELPIERRE, P DELGIUDICE, P and DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W and DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C and DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DIAMA, F and DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y EEK, LO EEROLA, PAM EHRET, R and EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA and FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P and FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F and FURNIVAL, K FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D and GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R and GOLOB, B GOLOYATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G and GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E and GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B and GUMENYUK, S GUY, J HAEDINGER, U HAHN, F HAHN, M and HAIDER, S HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K and DEMONCHENAULT, GH HAJDUK, Z HAKANSSON, A HALLGREN, A and HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL and HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD and HOFMOKL, T HOLMES, R HOLMGREN, SO HOLTHUIZEN, D and HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HUET, C and HULTH, PO HULTQVIST, K IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P and JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALKKINEN, J KALMUS, G and KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S and KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA and KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLEMPT, W and KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B and KOKKINIAS, P KOPF, M KORCYL, K KORYTOV, AV and KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH and KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U KUCEWICZ, W and KULKA, K KURVINEN, K LACASTA, C LAMBROPOULOS, C and LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R and LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LEVY, JM LIEB, E and LIKO, D LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I and LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A and AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P and LYONS, L MAEHLUM, G MAILLARD, J MALTEZOS, A MANDL, F and MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T and MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G and MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I and MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U and MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P and MUELLER, H MURRAY, WJ MYATT, G NARAGHI, F NAVARRIA, FL and NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V and NILSEN, PES NISS, P OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R and OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PASSERI, A and PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M and PERROTTA, A PETRIDOU, C PETROLINI, A PETROVYKH, L and PETTERSEN, TE PIERRE, F PIMENTA, M PINGOT, O and PLASZCZYNSKI, S POL, ME POLOK, G POROPAT, P PRIVITERA, P and PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J and RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, S ROSSI, U and ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W and RUHLMANNKLEIDER, V RUIZ, A SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHULZE, B SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F and SISAKIAN, AN SKAALI, TB SKJEVLING, G SMADJA, G SMITH, GR and SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R and SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T and TAVERNIER, S TCHIKILEV, O THEODOSIOU, GE TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, IG TODOROV, T TOET, DZ TOKER, O TORASSA, E TORTORA, L TREILLE, D and TREVISAN, U TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M and TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V and VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C and VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK and VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F and VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOULGARIS, G VOUTILAINEN, M and VRBA, V WAHLEN, H WALCK, C WALDNER, F WAYNE, M and WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J WALDNER, F and WICKENS, JH WIKNE, J WILKINSON, GR WILLIAMS, WSC and WINTER, M WITEK, M WORMALD, D WORMSER, G WOSCHNAGG, K and YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment, Nuclear Experiment
Abstract: A classifier based on a feed-forward neural network has been used for separating a sample of about 123 500 selected hadronic decays of the Z0, collected by DELPHI during 1991, into three classes according to the flavour of the original quark pair: uuBAR + ddBAR + ssBAR (unresolved), ccBAR and bbBAR. The classification has been used to compute the partial widths of the ZO into b and c quark pairs. This gave GAMMA(ccBAR)/GAMMA(h) = 0.151 +/- 0.008 (stat.) +/- 0.041 (syst.), GAMMA(bbBAR)/GAMMA(h) = 0.232 +/- 0.005 (stat.) +/- 0.017 (syst.).
Published: 1992

246. Charged particle multiplicity distributions for fixed number of jets in Z0 hadronic decays

Author: Abreu, P. Adam, W. Adye, T. Agasi, E. Aleseev, G.D. Allen, P. Almehed, S. Alvsvaag, S.J. Amaldi, U. Anassontzis, E.G. Andreazza, A. Antilogus, P. Apel, W.-D. Apsimon, R.J. Åsman, B. Augustin, J.-E. Augustinus, A. Baillon, P. Bambade, P. Barao, F. Barate, R. Barbiellini, G. Bardin, D.Y. Baroncelli, A. Barring, O. Barrio, J.A. Bartl, W. Bates, M.J. Battaglia, M. Baubillier, M. Becks, K.-H. Beeston, C.J. Begalli, M. Beilliere, P. Belokopytov, Yu. Beltran, P. Benedic, D. Berrgren, M. Bertrand, D. Bianchi, F. Bilenky, M.S. Billoir, P. Bjarne, J. Bloch, D. Blyth, S. Bocci, V. Bogolubov, P.N. Bolognese, T. Bonesini, M. Bonivento, W. Booth, P.S.L. Borgeaud, P. Borisov, G. Borner, H. Bosio, C. Bostjancic, B. Bosworth, S. Botner, O. Bouquet, B. Bourdarios, C. Bowcock, T.J.V. Bozzo, M. Braibant, S. Branchini, P. Brand, K.D. Brenner, R.A. Briand, H. Bricman, C. Brown, R.C.A. Brummer, N. Brunet, J.-M. Bugge, L. Buran, T. Burmeister, H. Buytaert, J.A.M.A. Caccia, M. Calvi, M. Camacho Rozas, A.J. Camporesi, T. Canale, V. Cao, F. Carena, F. Carroll, L. Caso, C. Castelli, E. Castillo Gimenez, M.V. Cattai, A. Cavallo, F.R. Cerrito, L. Chabaud, V. Chan, A. Charpentier, Ph. Chaussard, L. Chauveau, J. Checchia, P. Chelkov, G.A. Chevalier, L. Chliapnikov, P. Chorowicz, V. Chrin, J.T.M. Cirio, R. Clara, M.P. Collins, P. Contreras, J.L. Contri, R. Cortina, E. Cosme, G. Couchot, F. Crawley, H.B. Crennell, D. Crosetti, G. Crozon, M. Cuevas Maestro, J. Czellar, S. Dagoret, S. Dahl-Jensen, E. Dalmagne, B. Dam, M. Damgaard, G. Darbo, G. Daubie, E. Daum, A. Dauncey, P.D. Davenport, M. David, P. Da Silva, W. Defoix, C. Delikaris, D. Della Riccia, B.A. Delorme, S. Delpierre, P. Demaria, N. De Angelis, A. De Beer, M. De Boek, H. De Boer, W. De Clercq, C. De Fez Laso, M.D.M. De Groot, N. De La Vaissiere, C. De Lotto, B. De Min, A. Dijkstra, H. Di Ciaccio, L. Djama, F. Dolbeau, J. Donszelmann, M. Doroba, K. Dracos, M. Drees, J. Dris, M. Dufour, Y. Eek, L.-O. Eerola, P.A.-M. Ehret, R. Ekelof, T. Ekspong, G. Elliot Peisert, A. Engel, J.-P. Fassouliotis, D. Fearnley, T.A. Feindt, M. Fenyuk, A. Fernandez Alonso, M. Ferrer, A. Filippas, T.A. Firestone, A. Foeth, H. Fokitis, E. Fontanelli, F. Forbes, K.A.J. Franek, B. Frenkiel, P. Fries, D.C. Frodesen, A.G. Fruhwirth, R. Fulda-Quenzer, F. Furnival, K. Furstenau, H. Fuster, J. Galeazzi, G. Gamba, D. Carcia, C. Garcia, J. Gaspar, C. Gasparini, U. Gavillet, Ph. Gazis, E.N. Gazis, J.-P. Gerber, J.-P. Giacomelli, P. Gokieli, R. Golob, B. Golovatyuk, V.M. Gomez Y Cadenas, J.J. Goobar, A. Gopal, G. Gorski, M. Gracco, V. Grant, A. Grard, F. Graziani, E. Grosdidier, G. Gross, E. Grosse-Wiesmann, P. Grossetete, B. Gumenyuk, S. Guy, J. Haedinger, U. Hahn, F. Hahn, M. Haider, S. Hajduk, Z. Hakansson, A. Hallgren, A. Hamacher, K. Hamel De Moncenault, G. Hao, W. Harris, F.J. Henkes, T. Hernandez, J.J. Herquet, P. Herr, H. Hessing, T.L. Hietanen, I. Higgins, C.O. Higon, E. Hilke, H.J. Hodgson, S.D. Hofmokl, T. Holmes, R. Holmgren, S.-O. Holthuizen, D. Honore, P.F. Hooper, J.E. Houlden, M. Hrubec, J. Hulth, P.O. Hultqvist, K. Ioannou, P. Isenhower, D. Iversen, P.-S. Jackson, J.N. Jalocha, P. Jarlskog, G. Jarry, P. Jean-Marie, B. Johansson, E.K. Johnson, D. Jonker, M. Lonsson, L. Juillot, P. Kalkanis, G. Kalmus, G. Kapusta, F. Karlsson, M. Karvelas, E. Katsanevas, S. Katsoufis, E.C. Karanen, R. Kesteman, J. Khomenko, B.A. Khovanski, N.N. King, B. Kjaer, N.J. Klein, H. Klempt, W. Klovning, A. Kluit, P. Koch-Mehrin, A. Koehne, J.H. Koene, B. Kokkinias, P. Kopf, M. Korcyl, K. Korytov, A.V. Kostioukhine, V. Kourkoumelis, C. Kouznetsov, O. Kramer, P.H. Krolikowski, J. Kronkvist, I. Krstic, J. Kruener-Marquis, U. Krupinski, W. Kulka, K. Kurvinen, K. Lacasta, C. Lambropoulos, C. Lamsa, J.W. Lanceri, L. Lapin, V. Laugier, J.-P. Lauhakangas, R. Leder, G. Ledroit, F. Leitner, R. Lemoigne, Y. Lemonne, J. Lenzen, G. Lepeltier, V. Levy, J.M. Lieb, E. Liko, D. Lillethun, E. Lindgren, J. Lindner, R. Lipniacka, A. Lippi, I. Loerstad, B. Lokajicek, M. Loken, J.G. Lopez-Fernandez, A. Lopez Aguera, M.A. Los, M. Loukas, D. Lozano, J.J. Lutz, P. Lyons, L. Maehlum, G. Maillard, J. Maltezos, A. Mandl, F. Marco, J. Margoni, M. Marin, J.-C. Markou, A. Maron, T. Marti, S. Mathis, L. Matorras, F. Matteuzzi, C. Matthiae, G. Mazzucato, M. McCubbin, M. McKay, R. McNulty, R. Meola, G. Meroni, C. Meyer, W.T. Michelotto, M. Mikulec, I. Mitaroff, W.A. Mitselmakher, G.V. Mjoernmark, U. Moa, T. Moeller, R. Moenig, K. Monge, M.R. Morettini, P. Mueller, H. Murray, W.J. Muryn, B. Myatt, G. Naraghi, F. Navarria, F.L. Negri, P. Nielsen, B.S. Nijjhar, B. Nikolaenko, V. Nilsen, P.E.S. Niss, P. Obraztsov, V. Olshevski, A.G. Orava, R. Ostankov, A. Osterberg, K. Ouraou, A. Paganoni, M. Pain, R. Palka, H. Papadopoulou, Th.D. Pape, L. Passeri, A. Pegoraro, M. Pennanen, J. Perevozchikov, V. Pernicka, M. Perrotta, A. Petrolini, A. Pettersen, T.E. Pierre, F. Pimenta, M. Pingot, O. Pol, M.E. Polok, G. Poropat, P. Privitera, P. Pullia, A. Radojicic, D. Ragazzi, S. Ratoff, P.N. Read, A.L. Redaelli, N.G. Regler, M. Reid, D. Renton, P.B. Resvanis, L.K. Richard, F. Richardson, M. Ridky, J. Rinaudo, G. Roditi, I. Romero, A. Roncagliolo, I. Ronchese, P. Ronnqvist, C. Rosenberg, E.I. Rossi, S. Rossi, U. Rosso, E. Roudeau, P. Rovelli, T. Ruckstuhl, W. Ruhlmann, V. Ruiz, A. Rybicki, K. Saarikko, H. Sacquin, Y. Sajot, G. Salt, J. Sanchez, J. Sannino, M. Schael, S. Schneider, H. Schyns, M.A.E. Sciolla, G. Scuri, F. Segar, A.M. Sekulin, R. Sessa, M. Sette, G. Seufert, R. Shellard, R.C. Siccama, I. Siegrist, P. Simonetti, S. Simonetto, F. Sisakian, A.N. Skaali, T.B. Skjevling, G. Smadja, G. Smith, G.R. Sosnowski, R. Spassoff, T.S. Spiriti, E. Squarcia, S. Staeck, H. Stanescu, C. Stapnes, S. Stavropoulos, G. Stichelbaut, F. Stocchi, A. Strauss, J. Straver, J. Strub, R. Szczekowski, M. Szeptycka, M. Szymanski, P. Tabarelli, T. Tavernier, S. Tchikilev, O. Theodosiou, G.E. Tilquin, A. Timmermans, J. Timofeev, V.G. Tkatchev, L.G. Todorov, T. Toet, D.Z. Toker, O. Torassa, E. Tortora, L. Trainor, M.T. Treille, D. Trevisan, U. Trischuk, W. Tristram, G. Troncon, C. Tsirou, A. Tsyganov, E.N. Turala, M. Turluer, M.-L. Tuuva, T. Tyapkin, I.A. Tyndel, M. Tzamarias, S. Ueberschaer, S. Ullaland, O. Uvarov, V. Valenti, G. Vallazza, E. Valls Ferrer, J.A. Vander Velde, C. Van Apeldoorn, G.W. Van Dam, P. Van Doninck, W.K. Varela, J. Vaz, P. Vegni, G. Ventura, L. Venus, W. Verbeure, F. Vertogradov, L.S. Vilanova, D. Vitale, L. Vlasov, E. Vodopyanov, A.S. Vollmer, M. Volponi, S. Voulgaris, G. Voutilainen, M. Vrba, V. Wahlen, H. Walck, C. Waldner, F. Wayne, M. Wehr, A. Weierstall, M. Weilhammer, P. Werner, J. Wetherell, A.M. Wickens, J.H. Wikne, J. Wilkinson, G.R. Williams, W.S.C. Winter, M. Wormald, D. Wormser, G. Woschnagg, K. Yamdagni, N. Yepes, P. Zaitsev, A. Zalewska, A. Zalewski, P. Zavrtanik, D. Zevgolatakos, E. Zhang, G. Zimin, N.I. Zito, M. Zuberi, R. Zukanovich Funchal, R. Zumerle, G. Zuniga, J.
Subjects: Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Experiment
Abstract: The multiplicity distributions of charged particles in full phase space and in restricted rapidity intervals for events with a fixed number of jets measured by the DELPHI detector are presented. The data are well reproduced by the Lund Parton Shower model and can also be well described by fitted negative binomial distributions. The properties of these distributions in terms of the clan model are discussed. In symmetric 3-jet events the candidate gluon jet is found not to be significantly different in average multiplicity than the mean of the other two jets, thus supporting previous results of the HRS and OPAL experiments. Similar results hold for events generated according to the LUND PS and to the HERWIG models, when the jets are defined by the JADE jet finding algorithm. The method seems to be insensitive for measuring the color charge ratio between gluons and quarks. © 1992 Springer-Verlag.
Published: 1992

247. Measurement of the Z$^0$ branching fraction to b quark pairs using the boosted sphericity product

Author: Abreu, P., Adam, W., Adami, F., Adye, T., Akesson, T., Alekseev, G. D., Allen, P., Almehed, S., Alvsvaag, S. J., Amaldi, U., Anassontzis, E., Antilogus, P., Apel, W. D., Apsimon, R. J., Asman, B., E Augustin, J., Augustinus, A., Baillon, P., Bambade, P., Barao, F., Barate, R., Guido Barbiellini, Yu Bardin, D., Baroncelli, A., Barring, O., Bartl, W., Bates, M. J., Battaglia, M., Baubillier, M., Becks, K. H., Beeston, C. J., Begalli, M., Beilliere, P., Yu. Belokopytov, Beltran, P., Benedic, D., Benlloch, J. M., Berggren, M., Bertrand, D., Bianchi, F., Bilenkii, M. S., Billoir, P., Bjarne, J., Bloch, D., Blyth, S., Bocci, V., Bogolubov, P. N., Bolognese, T., Bonesini, M., Bonivento, W., Booth, P. S. L., Borgeaud, P., Borisov, G., Borner, H., Bosio, C., Bostjancic, B., Botner, O., Bouquet, B., Bourdarios, C., Bowcock, T. J. V., Bozzo, M., Braibant, S., Branchini, P., Brand, K. D., Brenner, R. A., Briand, H., Bricman, C., Brown, R. C. A., Brummer, N., Brunet, J. M., Bugge, L., Buran, T., Burmeister, H., Buytaert, J. A. M. A., Caccia, M., Calvi, M., Camacho Rozas, A. J., Camporesi, T., Canale, V., Cao, F., Carena, F., Carroll, L., Caso, C., Castelli, E., Castillo Gimenez, M. V., Cattai, A., Cavallo, F. R., Cerrito, L., Chan, A., Chapkin, M., Charpentier, P., Chaussard, L., Chauveau, J., Checchia, P., Chelkov, G. A., Chevalier, L., Chliapnikov, P., Chorowicz, V., Cirio, R., Clara, M. P., Collins, P., Contreras, J. L., Contri, R., Cosme, G., Couchot, F., Crawley, H. B., Crennell, D., Crosetti, G., Crozon, M., Cuevas Maestro, J., Czellar, S., Sylvie DAGORET, Dahl-Jensen, E., Almagne, B. D., Dam, M., Damgaard, G., Darbo, G., Daubie, E., Dauncey, P. D., Davenport, M., David, P., Da Silva, W., Defoix, C., Delikaris, D., Delorme, S., Delpierre, P., Demaria, N., Angelis, A., Beer, M., Boeck, H., Boer, W., Clercq, C., Fez Laso, M. D. M., Groot, N., La Vaissiere, C., Lotto, B., Min, A., Dijkstra, H., Di Ciaccio, L., Djama, F., Dolbeau, J., Donszelmann, M., Doroba, K., Dracos, M., Drees, J., Dris, M., Dufour, Y., Dulinski, W., Eek, L. O., Eerola, P. A., Ekelof, T., Ekspong, G., Elliot Peisert, A., Engel, J. P., Fassouliotis, D., Feindt, M., Fernandez Alonso, M., Ferrer, A., Filippas, T. A., Firestone, A., Foeth, H., Fokitis, E., Folegati, P., Fontanelli, F., Forbes, K. A. J., Franek, B., Frenkiel, P., Fries, D. C., Frodesen, A. G., Fruhwirth, R., Fulda-Quenzer, F., Furnival, K., Furstenau, H., Fuster, J., Galeazzi, G., Gamba, D., Garcia, C., Garcia, J., Gaspar, C., Gasparini, U., Gavillet, P., Gazis, E. N., Gerber, J. P., Giacomelli, P., Gokieli, R., Golovatyuk, V. M., Gomez, Y. Cadenas J. J., Goobar, A., Gopal, G., Gorski, M., Gracco, V., Grant, A., Grard, F., Graziani, E., Grosdidier, G., Gross, E., Grosse-Wiesmann, P., Grossetete, B., Gumenyuk, S., Guy, J., Hahn, F., Hahn, M., Haider, S., Hajduk, Z., Hakansson, A., Hallgren, A., Hamacher, K., Hamel Monchenault, G., Hao, W., Harris, F. J., Heck, B. W., Henkes, T., Hernandez, J. J., Herquet, P., Herr, H., Hessing, T. L., Hietanen, I., Higgins, C. O., Higon, E., Hilke, H. J., Hodgson, S. D., Hofmokl, T., Holmes, R., Holmgren, S. O., Holthuizen, D., Honore, P. F., Hooper, J. E., Houlden, M., Hrubec, J., Hulth, P. O., Hultqvist, K., Husson, D., Ioannou, P., Isenhower, D., Iversen, P. S., Jackson, J. N., Jalocha, P., Jarlskog, G., Jarry, P., Jean-Marie, B., Johansson, E. K., Johnson, D., Jonker, M., Jonsson, L., Juillot, P., Kalkanis, G., Kalmus, G., Kapusta, F., Karlsson, M., Katsanevas, S., Katsoufis, E. C., Keranen, R., Kesteman, J., Khomenko, B. A., Khovanski, N. N., King, B., Kjaer, N. J., Klein, H., Klempt, W., Klovning, A., Kluit, P., Kohne, J. H., Koene, B., Kokkinias, P., Kopf, M., Koratzinos, M., Korcyl, K., Korytov, A. V., Kostioukhine, V., Kourkoumelis, C., Kramer, P. H., Kreuzberger, T., Krolikowski, J., Kronkvist, I., Krstic, J., Kruner-Marquis, U., Krupinski, W., Kucewicz, W., Kurvinen, K., Lacasta, C., Lambropoulos, C., Lamsa, J. W., Lanceri, L., Lapin, V., Laugier, J. P., Lauhakangas, R., Leder, G., Ledroit, F., Leitner, R., Lemoigne, Y., Lemonne, J., Lenzen, G., Lepeltier, V., Letessier-Selvon, A., Lieb, E., Liko, D., Lillethun, E., Lindgren, J., Lindner, R., Lipniacka, A., Lippi, I., Llosa, R., Lorstad, B., Lokajicek, M., Loken, J. G., Lopez-Fernandez, A., Lopes Aguera, M. A., Los, M., Loukas, D., Lounis, A., Lozano, J. J., Lutz, P., Lyons, L., Maehlum, G., Maillard, J., Maltezos, A., Mandl, F., Marco, J., Margoni, M., Marin, J. C., Markou, A., Maron, T., Marti, S., Mathis, L., Matorras, F., Matteuzzi, C., Matthiae, G., Mazzucato, M., Mccubbin, M., Mckay, R., Mcnulty, R., Menichetti, E., Meola, G., Meroni, C., Meyer, W. T., Michelotto, M., Mitaroff, W. A., Mitselmakher, G., Mjornmark, U., Moa, T., Moller, R., Monig, K., Monge, M. R., Morettini, P., Muller, H., Murray, W. J., Muryn, B., Myatt, G., Naraghi, F., Navarria, F. L., Negri, P., Nielsen, B. S., Nijjhar, B., Nikolaenko, V., Obraztsov, V., Oesterberg, K., Olshevski, A. G., Orava, R., Ostankov, A., Ouraou, A., Paganoni, M., Pain, R., Palka, H., Papadopoulou, T., Pape, L., Passeri, A., Pegoraro, M., Pennanen, J., Perevozchikov, V., Pernicka, M., Perrotta, A., Pierre, F., Pimenta, M., Pingot, O., Pol, M. E., Polok, G., Poropat, P., Privitera, P., Pullia, A., Radojicic, D., Ragazzi, S., Ratoff, P. N., Read, A. L., Redaelli, N. G., Regler, M., Reid, D., Renton, P. B., Resvanis, L. K., Richard, F., Richardson, M., Ridky, J., Rinaudo, G., Roditi, I., Romero, A., Roncagliolo, I., Ronchese, P., Ronnqvist, C., Rosenberg, E. I., Rossi, U., Rosso, E., Roudeau, P., Rovelli, T., Ruckstuhl, W., Ruhlmann, V., Ruiz, A., Rybicki, K., Saarikko, H., Sacquin, Y., Sajot, G., Salt, J., Sanchez, E., Sanchez, J., Sannino, M., Schaeffer, M., Schael, S., Schneider, H., Schyns, M. A. E., Scuri, F., Segar, A. M., Sekulin, R., Sessa, M., Sette, G., Seufert, R., Shellard, R. C., Siegrist, P., Simonetti, S., Simonetto, F., Sisakian, A. N., Skaali, T. B., Skjevling, G., Smadja, G., Smith, G. R., Sosnowski, R., Spassoff, T. S., Spiriti, E., Squarcia, S., Stack, H., Stanescu, C., Stavropoulos, G., Stichelbaut, F., Stocchi, A., Strauss, J., Straver, J., Strub, R., Szczekowski, M., Szeptycka, M., Szymanski, P., Tabarelli, T., Tavernier, S., Chikilev, O., Theodosiou, G., Tilquin, A., Timmermans, J., Timofeev, V. G., Tkachev, L. G., Todorov, T., Toet, D. Z., Toker, O., Torassa, E., Tortora, L., Trainor, M. T., Treille, D., Trevisan, U., Trischuk, W., Tristram, G., Troncon, C., Tsirou, A., Tsyganov, E. N., Turala, M., Turchetta, R., Turluer, M., Tuuva, T., Tyapkin, I. A., Tyndel, M., Tzamarias, S., Uberschar, S., Ullaland, O., Uvarov, V. A., Valenti, G., Vallazza, E., Valls Ferrer, J. A., Vander Velde, C., Apeldoorn, G. W., Dam, P., Doninck, W. K., Varela, J., Vaz, P., Vegni, G., Laurent Ventura, Venus, W., Verbeure, F., Vertogradov, L. S., Vilanova, D., Vishnevskii, N., Vitale, L., Vlasov, E. V., Vlassopulos, S., Vodopyanov, A. S., Vollmer, M., Volponi, S., Voulgaris, G., Voutilainen, M., Vrba, V., Wahlen, H., Walck, C., Waldner, F., Wayne, M., Wehr, A., Weierstall, M., Weilhammer, P., Werner, J., Wetherell, A. M., Wickens, J. H., Wikne, J., Wilkinson, G. R., Williams, W. S. C., Winter, M., Wormald, D., Wormser, G., Woschnagg, K., Yamdagni, N., Yepes, P., Zaitsev, A., Zalewska, A., Zalewski, P., Zavrtanik, D., Zevgolatakos, E., Zhang, G., Zimin, N. I., Zito, M., Zitoun, R., Zukanovich Funchal, R., Zumerle, G., Zuniga, J., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), DELPHI, Delphi, Collaboration, Abreu, P., Adam, W., Canale, Vincenzo, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU)
Subjects: Nuclear and High Energy Physics, Particle physics, E+E ANNIHILATION, LUND MONTE-CARLO, Electron–positron annihilation, Hadron, 01 natural sciences, Bottom quark, JET FRAGMENTATION, DECAYS, Standard Model, Sphericity, Nuclear physics, PHYSICS, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Nuclear Experiment, Physics, 010308 nuclear & particles physics, Branching fraction, High Energy Physics::Phenomenology, Product (mathematics), Física nuclear, High Energy Physics::Experiment, Particle Physics - Experiment, Lepton
Abstract: From a sample of about 120 000 hadronic Z 0 decays, using a technique based on a separation of the different event categories in the boosted sphericity product, the fraction of b b decays has been measured to be 0.219 ± 0.014 (stat)± 0.019 (syst). Using the DELPHI determination of the hadronic Z 0 width, this corresponds to a partial width τ b b = 378 ± 42 MeV (in good agreement with the standard model prediction of ∼-380 MeV). Combining this measurement with the determinations based on events with high p t leptons gives an estimate for the branching ratio of b into leptons at LEP of (11.2 ± 1.2)%, consistent with previous determinations.
Published: 1992

248. BOSE-EINSTEIN CORRELATIONS IN THE HADRONIC DECAYS OF THE Z(0)

Author: ABREU, P ADAM, W ADYE, T AGASI, E ALEKSEEV, GD and ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANASSONTZIS, EG ANDREAZZA, A ANTILOGUS, P APEL, WD APSIMON, RJ and ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY and BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ and BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ and BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P and BENEDIC, D BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V and BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W and BOOTH, PSL BORGEAUD, P BORISOV, G BORNER, H BOSIO, C and BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B and BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S and BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C and BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T and BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M and ROZAS, AJC CAMPORESI, T CANALE, V CAO, F CARENA, F and CARROLL, L CASO, C CASTELLI, E GIMENEZ, MVC CATTAI, A and CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHAPKIN, M and CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P and CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V and CHRIN, JTM CIRIO, R CLARA, MP COLLINS, P CONTRERAS, JL and CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB and CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC and CZELLAR, S DAGORET, S DAHLJENSEN, E DALMAGNE, B DAM, M and DAMGAARD, G DARBO, G DAUBIE, E DAUM, A DAUNCEY, PD and DAVENPORT, M DAVID, P DASILVA, W DEFOIX, C and DELIKARIS, D DELLARICCIA, BA DELORME, S DELPIERRE, P and DEMARIA, N DEANGELIS, A DEBEER, M DEBOECK, H DEBOER, W and DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C and DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DJAMA, F and DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y EEK, LO EEROLA, PAM EHRET, R and EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP FASSOULIOTIS, D FEARNLEY, TA FEINDT, M ALONSO, MF FERRER, A and FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E and FONTANELLI, F FORBES, KAJ FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K and FURSTENAU, H FUSTER, J GALEAZZI, G GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P and GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R and GOLOVATYUK, VM CADENAS, JJGY GOOBAR, A GOPAL, G GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E and GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B and GUY, J HAEDINGER, U HAHN, F HAHN, M HAIDER, S and HAJDUK, Z HAKANSSON, A HALLGREN, A HAMACHER, K and DEMONCHENAULT, GH HAO, W HARRIS, FJ HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIETANEN, I and HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T and HOLMES, R HOLMGREN, SO HOLTHUIZEN, D HONORE, PF and HOOPER, JE HOULDEN, M HRUBEC, J HULTH, PO HULTQVIST, K and IOANNOU, P ISENHOWER, D IVERSEN, PS JACKSON, JN and JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P and KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E and KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J and KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H and KLEMPT, W KLOVNING, A KLUIT, P KOEHNE, JH KOENE, B and KOKKINIAS, P KOPF, M KORCYL, K KORYTOV, AV and KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH and KROLIKOWSKI, J KRONKVIST, I KRSTIC, J KRUENERMARQUIS, U and KRUPINSKI, W KULKA, K KURVINEN, K LACASTA, C and LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R and LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V and LETESSIERSELVON, A LEVY, JM LIEB, E LIKO, D LILLETHUN, E and LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I and LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A and AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P and LYONS, L MAEHLUM, G MAILLARD, J MALTEZOS, A MANDL, F and MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T and MARTI, S MATHIS, L MATORRAS, F MATTEUZZI, C MATTHIAE, G and MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I and MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T and MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H and MURRAY, WJ MURYN, B MYATT, G NARAGHI, F NAVARRIA, FL and NEGRI, P NIELSEN, BS NIJJHAR, B NIKOLAENKO, V and NILSEN, PES NISS, P OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R and OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PASSERI, A and PEGORARO, M PENNANEN, J PEREVOZCHIKOV, V PERNICKA, M and PERROTTA, A PETROLINI, A PETTERSEN, TE PIERRE, F and PIMENTA, M PINGOT, O POL, ME POLOK, G POROPAT, P and PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RATOFF, PN READ, AL REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J and RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, S ROSSI, U and ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANN, V and RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G and SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H and SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEKULIN, R and SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SICCAMA, I and SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN and SKAALI, TB SKJEVLING, G SMADJA, G SMIRNOV, N SMITH, GR and SOSNOWSKI, R SPASSOFF, TS SPIRITI, E SQUARCIA, S and STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G and STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R and SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T and TAVERNIER, S TCHIKILEV, O THEODOSIOU, GE TILQUIN, A and TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOMARADZE, A TORASSA, E TORTORA, L and TRAINOR, MT TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M and TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S and UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G and VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW and VANDAM, P VANDONINCK, WK VARELA, J VAZ, P VEGNI, G and VENTURA, L VENUS, W VERBEURE, F VERTOGRADOV, LS and VILANOVA, D VITALE, L VLASOV, E VLASSOPOULOS, S and VODOPYANOV, AS VOLLMER, M VOLPONI, S VOULGARIS, G and VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F and WAYNE, M WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J and WETHERELL, AM WICKENS, JH WIKNE, J WILKINSON, GR and WILLIAMS, WSC WINTER, M WORMALD, D WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A and ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZITOUN, R ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J
Subjects: High Energy Physics::Experiment, Nuclear Experiment
Abstract: Bose-Einstein correlations between pairs of like-sign charged particles produced in e+e- annihilations near the Z0 peak have been studied using data taken with the DELPHI detector at LEP. An enhancement is found in the production of pairs of identical pions of similar momenta, with respect to a reference sample. Under the hypothesis that the pions are emitted by a spherically symmetrical source with gaussian density, the data indicate a radius of the source of r = 0.62 +/- 0.04(stat.) +/- 0.20(syst.) fm. The large systematic uncertainty reflects the sensitivity of r to the choice of the reference sample.
Published: 1992

249. A measurement of the b$\overline{b}$ forward backward asymmetry using the semileptonic decay into muons

Author: Abreu, P, Adam, W, Adami, F, Adye, T, Åkesson, T, Alekseev, G D, Allen, P, Almehed, S, Alvsvaag, S J, Amaldi, Ugo, Anassontzis, E G, Antilogus, P, Apel, W D, Apsimon, R J, Åsman, B, Augustin, J E, Augustinus, A, Baillon, Paul, Bambade, P, Barão, F, Barate, R, Barbiellini, Guido, Bardin, Dimitri Yuri, Baroncelli, A, Bärring, O, Bartl, Walter, Bates, M J, Battaglia, Marco, Baubillier, M, Becks, K H, Beeston, C J, Begalli, M, Beillière, P, Belokopytov, Yu A, Beltran, P, Benedic, D, Benlloch, J M, Berggren, M, Bertrand, D, Bianchi, F, Bilenky, S M, Billoir, P, Bjarne, J, Bloch, D, Blyth, S, Bocci, V, Bogolubov, P N, Bolognese, T, Bonapart, M, Bonesini, M, Bonivento, W, Booth, P S L, Borgeaud, P, Borisov, G, Börner, H, Bosio, C, Bostjancic, B, Botner, O, Bouquet, B, Bourdarios, C, Bozzo, M, Braibant, S, Branchini, P, Brand, K D, Brenner, R A, Briand, H, Bricman, C, Brown, R C A, Brümmer, N, Brunet, J M, Bugge, L, Buran, T, Burmeister, H, Buytaert, J, Caccia, M, Calvi, M, Camacho-Rozas, A J, Campion, A, Camporesi, T, Canale, V, Cao, F, Carena, F, Carroll, L, Caso, Carlo, Castelli, Edoardo, Castillo-Gimenez, M V, Cattai, A, Cavallo, F R, Cerrito, L, Chan, A, Chapkin, M M, Charpentier, P, Chaussard, L, Checchia, P, Chelkov, G A, Chevalier, L, Chliapnikov, P V, Chorowicz, V, Cirio, R, Clara, M P, Collins, P, Contreras, J L, Contri, R, Cosme, G, Couchot, F, Crawley, H B, Crennell, D J, Crosetti, G, Crozon, M, Cuevas-Maestro, J, Czellar, S, Dagoret, S, Dahl-Jensen, Erik, D'Almagne, B, Dam, M, Damgaard, G, Darbo, G, Daubie, Evelyne, Dauncey, P D, Davenport, Martyn, David, P, Da Silva, W, Defoix, C, Delikaris, D, Delorme, S, Delpierre, P A, Demaria, N, De Angelis, A, De Beer, M, De Boeck, H, de Boer, Wim, De Clercq, C, De Fez Laso, M D M, De Groot, N, La Vaissière, C de, De Lotto, B, De Min, A, Dijkstra, H, Di Ciaccio, Lucia, Djama, F, Dolbeau, J, Dönszelmann, M, Doroba, K, Dracos, M, Drees, J, Dris, M, Dufour, Y, Dulinski, W, Dzhelyadin, R I, Eek, L O, Eerola, Paule Anna Mari, Ekelöf, T J C, Ekspong, Gösta, Elliot-Peisert, A, Engel, J P, Fassouliotis, D, Feindt, Michael, Fernández-Alonso, M, Ferrer, A, Filippas-Tassos, A, Firestone, A, Föth, H, Fokitis, E, Folegati, P, Fontanelli, F, Forbes, K A J, Franek, B J, Frenkiel, P, Fries, D E C, Frodesen, A G, Frühwirth, R, Fulda-Quenzer, F, Furnival, K, Fürstenau, H, Fuster, J A, Galeazzi, G, Gamba, D, García, C, García, J, Gaspar, C, Gasparini, U, Gavillet, P, Gazis, E N, Gerber, J P, Giacomelli, P, Gokieli, R, Golovatyuk, V M, Gómez-Cadenas, J J, Goobar, A, Gopal, Gian P, Górski, M, Gracco, Valerio, Grant, A, Grard, F, Graziani, E, Grosdidier, G, Gross, E, Grosse-Wiesmann, P, Grossetête, B, Gumenyuk, S A, Guy, J, Hahn, F, Hahn, M, Haider, S, Hajduk, Z, Hakansson, A, Hallgren, A, Hamacher, K, Hamel de Monchenault, G, Harris, F J, Heck, B W, Henkes, T, Hernández, J J, Herquet, P, Herr, H, Hietanen, I, Higgins, C O, Higón, E, Hilke, Hans Jürgen, Hodgson, S D, Hofmokl, T, Holmes, R, Holmgren, S O, Holthuizen, D J, Honoré, P F, Hooper, J E, Houlden, M A, Hrubec, Josef, Hulth, P O, Hultqvist, K, Husson, D, Ioannou, P, Isenhower, D, Iversen, P S, Jackson, J N, Jalocha, P, Jarlskog, G, Jarry, P, Jean-Marie, B, Johansson, E K, Johnson, D, Jonker, M, Jönsson, L B, Juillot, P, Kalkanis, G, Kalmus, George Ernest, Kapusta, F, Karlsson, M, Katsanevas, S, Katsoufis, E C, Keränen, R, Kesteman, J, Khomenko, B A, Khovanskii, N N, King, B J, Kjaer, N J, Klein, H, Klempt, W, Klovning, A, Kluit, P M, Köhne, J H, Köne, B, Kokkinias, P, Kopf, M, Koratzinos, M, Korcyl, K, Korytov, A V, Kostyukhin, V, Kourkoumelis, C, Kramer, P H, Kreuzberger, T, Królikowski, J, Kronkvist, I J, Krstic, J, Krüner-Marquis, U, Krupinski, W, Kucewicz, W, Kurvinen, K L, Lacasta, C, Lambropoulos, C, Lamsa, J, Lanceri, L, Lapin, V, Laugier, J P, Lauhakangas, R, Leder, Gerhard, Ledroit, F, Leitner, R, Lemoigne, Y, Lemonne, J, Lenzen, Georg, Lepeltier, V, Letessier-Selvon, A A, Lieb, E H, Liko, D, Lillethun, E, Lindgren, J, Lindner, R, Lipniacka, A, Lippi, I, Llosa, R, Lörstad, B, Lokajícek, M, Loken, J G, López-Fernandez, A, López-Aguera, M A, Los, M E, Loukas, D, Lounis, A, Lozano-Bahilo, J, Lutz, P, Lyons, L, Maehlum, G, Maillard, J, Maltezos, A, Mandl, F, Marco, J, Margoni, M, Marin, J C, Markou, A, Maron, T, Martí, S, Mathis, L G, Matorras, F, Matteuzzi, C, Matthiae, Giorgio, Matveev, M Yu, Mazzucato, M, McCubbin, M L, McKay, R, McNulty, R, Menichetti, E, Meola, G, Meroni, C, Meyer, W T, Michelotto, M, Mitaroff, Winfried A, Mitselmakher, G, Mjörnmark, U, Moa, T, Møller, R, Mönig, K, Monge, M R, Morettini, P, Müller, H, Murray, W J, Muryn, B, Myatt, Gerald, Naraghi, F, Navarria, Francesco Luigi, Negri, P, Nielsen, B S, Nijjhar, B, Nikolaenko, V, Obraztsov, V F, Österberg, K, Olshevskii, A G, Orava, Risto, Ostankov, A P, Ouraou, A, Paganoni, M, Pain, R, Palka, H, Papadopoulou, T D, Pape, L, Passeri, A, Pegoraro, M, Pennanen, J, Perevozchikov, V, Pernicka, Manfred, Perrotta, A, Pierre, F, Pimenta, M, Pingot, O, Pol, M E, Polok, G, Poropat, P, Privitera, P, Pullia, Antonio, Radojicic, D, Ragazzi, S, Ratoff, P N, Read, A L, Redaelli, N G, Regler, Meinhard, Reid, D, Renton, P B, Resvanis, L K, Richard, F, Richardson, M, Rídky, J, Rinaudo, G, Roditi, I, Romero, A, Roncagliolo, I, Ronchese, P, Rönnqvist, C, Rosenberg, E I, Rossi, U, Rosso, E, Roudeau, Patrick, Rovelli, T, Rückstuhl, W, Ruhlmann, V, Ruiz, A, Rybicki, K, Saarikko, H, Sacquin, Yu, Sajot, G, Salt, J, Sánchez, E, Sánchez, J, Sannino, M, Schäffer, M, Schael, S, Schneider, H, Schyns, M A E, Scuri, F, Segar, A M, Sekulin, R L, Sessa, M I, Sette, G, Seufert, R, Shellard, R C, Siegrist, P, Simonetti, S, Simonetto, F, Sissakian, A N, Skaali, T B, Skjevling, G, Smadja, G, Smirnov, N, Smith, G R, Sosnowski, R, Spassoff, Tz, Spiriti, E, Squarcia, S, Stäck, H, Stanescu, C, Stavropoulos, G D, Stichelbaut, F, Stocchi, A, Strauss, J, Strub, R, Szczekowski, M, Szeptycka, M, Szymanski, P, Tabarelli de Fatis, T, Tavernier, Stefaan, Theodosiou, G E, Tilquin, A, Timmermans, J, Timofeev, V G, Tkatchev, L G, Todorov, T, Toet, D Z, Toker, O, Torassa, E, Tortora, L, Trainor, M T, Treille, D, Trevisan, U, Trischuk, W, Tristram, G, Troncon, C, Tsirou, A L, Tsyganov, E N, Turala, Michal, Turchetta, R, Turluer, M L, Tuuva, T, Tyapkin, I A, Tyndel, M, Tzamarias, S, Überschär, S, Ullaland, O, Uvarov, V, Valenti, G, Vallazza, E, Valls Ferrer, J A, Van der Velde, C, van Apeldoorn, G W, van Dam, P, Van Doninck, W K, Varela, J, Vaz, P, Vegni, G, Ventura, L, Venus, W A, Verbeure, F, Vertogradov, L S, Vilanova, D, Vitale, L, Vlasov, E V, Vlassopoulos, S, Vodopyanov, A S, Vollmer, M, Volponi, S, Voulgaris, G, Voutilainen, M, Vrba, V, Wahlen, H, Walck, C, Waldner, F, Wayne, M, Wehr, A, Weierstall, M, Weilhammer, Peter, Werner, J, Wetherell, Alan M, Wickens, J H, Wikne, J, Wilkinson, G R, Williams, W S C, Winter, M, Wormald, D, Wormser, G, Woschnagg, K, Yamdagni, N, Yepes, P, Zaitsev, A, Zalewska-Bak, A, Zalewski, Piotr, Zavrtanik, D, Zevgolatakos, E, Zhang, G, Zimin, N I, Zito, M, Zitoun, R, Zukanovich-Funchal, R, Zumerle, G, and Zúñiga, J
Subjects: Particle Physics - Experiment
Published: 1991

250. The Reaction $e^{+}e^{-} \to \gamma\gamma (\gamma)$ at $Z^{0}$ Energies

Author: Abreu, P, Adam, W, Adami, F, Adye, T, Åkesson, T, Alekseev, G D, Allen, P, Almehed, S, Alted, F, Alvsvaag, S J, Amaldi, Ugo, Anassontzis, E G, Antilogus, P, Apel, W D, Apsimon, R J, Åsman, B, Astier, Pierre, Augustin, J E, Augustinus, A, Baillon, Paul, Bambade, P, Barão, F, Barbiellini, Guido, Bardin, Dimitri Yuri, Baroncelli, A, Bärring, O, Bartl, Walter, Battaglia, Marco, Bates, M J, Baubillier, M, Becks, K H, Beeston, C J, Begalli, M, Beillière, P, Belokopytov, Yu A, Beltran, P, Benedic, D, Benlloch, J M, Berggren, M, Bertrand, D, Biagi, S F, Bianchi, F, Bibby, J H, Bilenky, S M, Billoir, P, Bjarne, J, Bloch, D, Blyth, S, Bogolubov, P N, Bolognese, T, Bonapart, M, Bonesini, M, Bonivento, W, Booth, P S L, Boratav, M, Borgeaud, P, Borisov, G, Börner, H, Bosio, C, Botner, O, Bouquet, B, Bozzo, M, Braibant, S, Branchini, P, Brand, K D, Brenner, R A, Bricman, C, Brown, R C A, Brümmer, N, Brunet, J M, Bugge, L, Buran, T, Burmeister, H, Buytaert, J, Caccia, M, Calvi, M, Camacho-Rozas, A J, Campagne, J E, Campion, A, Camporesi, T, Canale, V, Cao, F, Carroll, L, Caso, Carlo, Castelli, Edoardo, Castillo-Gimenez, M V, Cattai, A, Cavallo, F R, Cerrito, L, Charpentier, P, Checchia, P, Chelkov, G A, Chevalier, L, Chliapnikov, P V, Chorowicz, V, Cirio, R, Clara, M P, Collins, P, Contreras, J L, Contri, R, Cosme, G, Couchot, F, Crawley, H B, Crennell, D J, Crosetti, G, Crosland, N, Crozon, M, Cuevas-Maestro, J, Czellar, S, Dagoret, S, Dahl-Jensen, Erik, D'Almagne, B, Dam, M, Damgaard, G, Darbo, G, Daubie, Evelyne, Dauncey, P D, Davenport, Martyn, David, P, De Angelis, A, De Beer, M, De Boeck, H, de Boer, Wim, De Clercq, C, De Fez Laso, M D M, De Groot, N, La Vaissière, C de, De Lotto, B, De Min, A, Defoix, C, Delikaris, D, Delorme, S, Delpierre, P A, Demaria, N, Derkaoui, J E, Di Ciaccio, Lucia, Dijkstra, H, Djama, F, Dolbeau, J, Dönszelmann, M, Doroba, K, Dracos, M, Drees, J, Dris, M, Dufour, Y, Dulinski, W, Dzhelyadin, R I, Eek, L, Eerola, Paule Anna Mari, Ekelöf, T J C, Ekspong, Gösta, Elliot-Peisert, A, Engel, J P, Fassouliotis, D, Fenyuk, A, Fernández-Alonso, M, Ferrer, A, Filippas-Tassos, A, Firestone, A, Föth, H, Fokitis, E, Folegati, P, Fontanelli, F, Forsbach, H, Franek, B J, Frenkiel, P, Fries, D E C, Frodesen, A G, Frühwirth, R, Fulda-Quenzer, F, Furnival, K, Fürstenau, H, Fuster, J A, Gago, J M, Galeazzi, G, Gamba, D, García, C, García, J, Gasparini, U, Gavillet, P, Gazis, E N, Gerber, J P, Giacomelli, P, Glitza, K W, Gokieli, R, Golovatyuk, V M, Gómez-Cadenas, J J, Goobar, A, Gopal, Gian P, Górski, M, Gracco, Valerio, Grant, A, Grard, F, Graziani, E, Gros, M H, Grosdidier, G, Grossetête, B, Gumenyuk, S A, Guy, J, Hahn, F, Hahn, M, Haider, S, Hajduk, Z, Hakansson, A, Hallgren, A, Hamacher, K, Hamel de Monchenault, G, Harris, J F, Heck, B, Herbst, I, Hernández, J J, Herquet, P, Herr, H, Hietanen, I, Higón, E, Hilke, Hans Jürgen, Hodgson, S D, Hofmokl, T, Holmes, R, Holmgren, S O, Holthuizen, D J, Honoré, P F, Hooper, J E, Houlden, M A, Hrubec, Josef, Hulth, P O, Hultqvist, K, Husson, D, Hyams, Bernard David, Ioannou, P, Isenhower, D, Iversen, P S, Jackson, J N, Jalocha, P, Jarlskog, G, Jarry, P, Jean-Marie, B, Johansson, E K, Johnson, D, Jonker, M, Jönsson, L B, Juillot, P, Kalkanis, G, Kalmus, George Ernest, Kantardjian, G, Kapusta, F, Katargin, A, Katsanevas, S, Katsoufis, E C, Keränen, R, Kesteman, J, Khomenko, B A, Khovanskii, N N, King, B J, Kjaer, N J, Klein, H, Klempt, W, Klovning, A, Kluit, P M, Köne, B, Köhne, J H, Kokkinias, P, Kopf, M, Koratzinos, M, Korcyl, K, Korytov, A V, Korzen, B, Kostyukhin, V, Kourkoumelis, C, Kreuzberger, T, Królikowski, J, Krüner-Marquis, U, Krupinski, W, Kucewicz, W, Kurvinen, K L, Lacasta, C, Lambropoulos, C, Lamsa, J, Lanceri, L, Lapin, V, Laugier, J P, Lauhakangas, R, Leder, Gerhard, Ledroit, F, Lemonne, J, Lenzen, Georg, Lepeltier, V, Letessier-Selvon, A A, Liko, D, Lieb, E H, Lillethun, E, Lindgren, J, Lipniacka, A, Lippi, I, Llosa, R, Lörstad, B, Lokajícek, M, Loken, J G, López-Aguera, M A, López-Fernandez, A, Los, M E, Loukas, D, Lounis, A, Lozano-Bahilo, J, Lucock, R, Lutz, P, Lyons, L, Maehlum, G, Maillard, J, Maltezos, A, Maltezos, S, Mandl, F, Marco, J, Margoni, M, Marin, J C, Markou, A, Martí, S, Mathis, L G, Matorras, F, Matteuzzi, C, Matthiae, Giorgio, Mazzucato, M, McCubbin, M L, McKay, R, McNulty, R, Menichetti, E, Meroni, C, Meyer, W T, Michelotto, M, Mitselmakher, G, Mitaroff, Winfried A, Mjörnmark, U, Moa, T, Møller, R, Monge, M R, Mönig, K, Morettini, P, Murray, W J, Myatt, Gerald, Naraghi, F, Nau-Korzen, U, Navarria, Francesco Luigi, Negri, P, Nielsen, B S, Nijjhar, B, Nikolaenko, V, Obraztsov, V F, Olshevskii, A G, Orava, Risto, Ostankov, A P, Ouraou, A, Pain, R, Palka, H, Papadopoulou, T D, Pape, L, Passeri, A, Pegoraro, M, Perevozchikov, V, Pernicka, Manfred, Perrotta, A, Pierre, F, Pimenta, M, Pingot, O, Pinsent, A C, Pol, M E, Polok, G, Poropat, P, Privitera, P, Pullia, Antonio, Pyyhtiä, J, Radojicic, D, Ragazzi, S, Range, W H, Ratoff, P N, Read, A L, Redaelli, N G, Regler, Meinhard, Reid, D, Renton, P B, Resvanis, L K, Richard, F, Richardson, M, Rídky, J, Rinaudo, G, Roditi, I, Romero, A, Roncagliolo, I, Ronchese, P, Rönnqvist, C, Rosenberg, E I, Rossi, U, Rosso, E, Roudeau, Patrick, Rovelli, T, Rückstuhl, W, Ruhlmann, V, Ruiz, A, Rybicki, K, Saarikko, H, Sacquin, Yu, Salt, J, Sánchez, E, Sánchez, J, Sannino, M, Schäffer, M, Schael, S, Schneider, H, Scuri, F, Segar, A, Sekulin, R L, Sessa, M I, Sette, G, Seufert, R, Shellard, R C, Siegrist, P, Simonetti, S, Simonetto, F, Sissakian, A N, Skaali, T B, Skjevling, G, Smadja, G, Smith, G R, Sosnowski, R, Spassoff, Tz, Spiriti, E, Squarcia, S, Stäck, H, Stanescu, C, Stavropoulos, G D, Stichelbaut, F, Stocchi, A, Strauss, J, Strub, R, Stubenrauch, Claudia J, Szczekowski, M, Szeptycka, M, Szymanski, P, Tabarelli de Fatis, T, Tavernier, Stefaan, Theodosiou, G E, Tilquin, A, Timmermans, J, Timofeev, V G, Tkatchev, L G, Todorov, T, Toet, D Z, Tortora, L, Trainor, M T, Treille, D, Trevisan, U, Trischuk, W, Tristram, G, Troncon, C, Tsirou, A L, Tsyganov, E N, Turala, Michal, Turchetta, R, Turluer, M L, Tuuva, T, Tyapkin, I A, Tyndel, M, Tzamarias, S, Überschär, B, Überschär, S, Ullaland, O, Uvarov, V, Valenti, G, Vallazza, E, Valls Ferrer, J A, van Apeldoorn, G, van Dam, P, Van Doninck, W K, van Eijndhoven, N, Van der Velde, C, Varela, J, Vaz, P, Vegni, G, Velasco, J, Ventura, L, Venus, W A, Verbeure, F, Vertogradov, L S, Vibert, L, Vilanova, D, Vlasov, E V, Vodopyanov, A S, Vollmer, M, Volponi, S, Voulgaris, G, Voutilainen, M, Vrba, V, Wahlen, H, Walck, C, Waldner, F, Wayne, M, Weilhammer, Peter, Werner, J, Wetherell, Alan M, Wickens, J H, Wikne, J, Wilkinson, G R, Williams, W S C, Winter, M, Wormald, D, Wormser, G, Woschnagg, K, Yamdagni, N, Yepes, P, Zaitsev, A, Zalewska-Bak, A, Zalewski, Piotr, Zevgolatakos, E, Zhang, G, Zimin, N I, Zito, M, Zitoun, R, Zukanovich-Funchal, R, Zumerle, G, and Zúñiga, J
Subjects: Particle Physics - Experiment
Published: 1991

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